PRIVATE
Sex Advice to
Women

COPYRIGHT, 1917

CHICAGO, ILL.

Sex Advice to Women

Sex Advice to Women

LESSON I
FOREWORD

Even those about to enter into the important offices of matrimony and parenthood are permitted to assume those duties and responsibilities without intelligent and scientific information or knowledge being given them. What would we think of expecting a woman to cook, without previous experience and without even the most elementary instruction on the subject? What would we think of expecting any person to undertake any important task or duty without experience or instruction regarding the same? And yet we seem content to allow young women to enter into the important relationship of marriage, and to undertake the important office of motherhood, often in absolute ignorance of the physiological processes involved, and the physical laws governing the same.

All this absurd practice and custom results simply from the antiquated notion that it is "not nice" to speak or think of the subject of the sex functions. The subject has been considered "taboo" by our particular section of the human race since the Middle Ages, because the ascetic ideals of that dark period of human history brought forward a totally false and unnatural conception of sex as fundamentally impure. If the results were not so deplorable and often tragic, this condition of affairs would be a fit subject for laughter and scornful ridicule. But, alas! on the part of the thoughtful observer of this state of things there is rather great wonder and amazement accompanied by the feeling of deep sorrow.

It cannot be honestly denied that in our present age, and period of modern civilization, and particularly among the Anglo-Saxon branch of the race, the question of the sex functions is associated with impurity, at least so far as the popular mind is concerned. In previous civilizations the subject was accorded its proper place, and was discussed sanely and thoughtfully, without any sense of shame or impurity. The Middle Age ideals of celibacy and asceticism brought about the public conception of the human body as a thing impure—something to be modified, tortured, subdued and reviled; and a corresponding conception of sex as a vile, impure thing above which the pure in heart rose entirely and completely, and which those of a lesser spiritual ideal were permitted to indulge with a due sense of their degradation and weakness. It was considered a most worthy thing to lead an ascetic life with its accompaniment of disdain and punishment of the body. It was considered most pious and spiritual to forego the ordinary human relations of sex, marriage and parenthood. From these distorted conceptions naturally evolved the idea that sex, and all connected with it, was a subject unclean and impure in itself, and to be avoided in thought, conversation and writing. Not only the ordinary sex relations of human life were placed under this taboo, but also the phenomena of birth and parenthood. Not only did these incidents of life grow to be considered impure, but they became that which to many was still worse, that is to say, they became to be regarded as "not respectable."

Ignorance regarding the plain elementary facts of sexual physiology is undoubtedly the cause not only of much immorality among young people of both sexes, but also of many unhappy and inharmonious marriages. The intelligent portion of our race is now beginning to realize very keenly the fact that the first requisite of sane marital relations and intelligent parenthood is a practical and clear knowledge of the physiology of sex; education concerning the sexual organism, its laws, its functions, its normal and healthy conditions, its anatomy, its physiology and hygiene.

The average physician of experience in general or special practice can tell tales of almost incredible ignorance on the part of young women who have recently entered into the relationship of marriage. In some cases the ignorance is more than a mere absence of knowledge—it consists too often of false-knowledge, untruthful ideas concerning matters of the most serious import. It is sad enough to think how such persons may work results harmful to themselves, but it is even sadder still to realize that these same ignorant young women must eventually gain their real knowledge through sad experience—experience paid for not only by themselves but also by their children. It is a hard saying, but a true one, that the knowledge of many young wives and mothers is to be gained by experience paid for by their (as yet) unborn children.

The writer of the present work is one of the rapidly growing number of thinking persons who believe that the time has come to educate the race concerning the importance of sane instruction concerning the functions of sex. He, and those who think as he does, believe that the time has come to "Turn on the Light!" They believe that the importance of the subject will be realized by all intelligent persons, once that their attention is directed to the subject, and once they have considered it apart from the old prejudices and distorted customs. When public opinion on this subject is reformed, then will the taboo fall away from the body of truth; then will the subject take its place among the "respectable" topics which may be considered, discussed, and taught, without loss of caste or prestige.

In a few decades, perhaps even much sooner, it will be regarded as quite reprehensible to permit young persons to enter into the relationship of marriage without a sane, practical knowledge of their own reproductive organism and the functions thereof, and of their physiological duties to themselves, to their companions in marriage, and to their children born or to be born. We may even see the practical application of the somewhat startling prophecy of Newell Dwight Hillis, D. D., who said: "The State that makes a man study two years before a license as druggist is given; that makes a young lawyer or doctor study three years before being permitted to practice; ought to ask the young man or young woman to pass an equally rigid examination before license is given to found an American home, and set up an American family."

While the information above alluded to should be given alike to the young husband and the young wife, it cannot be doubted that the latter is the one of the pair who is most in need of this kind of instruction. While both the young man and the young woman require this instruction, the need is the greater in the case of the young woman, by the very nature of the case. The sex functions and processes play a much more important part in the life of the woman than in that of the man, the protests of some of the modern feminists to the contrary notwithstanding. The careful student of the sex life of men and women frankly confesses that in both the physical and the psychical realm the sex offices make a greater demand upon the time and attention of the woman than of the man.

The love-life of the woman is far fuller and more absorbing than is that of the man. Unhappiness concerning her love-life renders the remainder of the life of the average woman of comparatively little account; while, with a happy love-life she will put up cheerfully with the absence of many other things which are usually regarded as necessities for happiness. As a writer has said: "Essentially, a woman is made for love—not exclusively, but essentially; and a woman who has had no love in her life has been a failure."

The same rule operates on the physical plane. As the same writer has said: "Physically, the woman is also much more cognizant of her sex and much more hampered by the manifestation of her sex nature than man is." The manifestation of the incidents of menstruation is a constant reminder to the woman that she is a creature of sex. The phenomenon of pregnancy is, likewise, something from which the man is free. And, finally, the menopause, or "change of life," with its incidents greatly influencing the physical, mental, and emotional well-being of the woman, is Nature's final word to the woman that she is the active pole of sex-life. As the above-quoted writer has said: "Altogether it cannot be denied that woman is much more a slave of her sex-nature than man is of his. Nature has handicapped woman much more heavily than she has man."

And so, in this book, the young woman—the young wife—is directly addressed, her companion and mate being referred to only indirectly.

LESSON II
ANATOMY OF THE FEMALE SEX ORGANISM

And yet, custom and ancient prejudice have drawn the veil over this most important subject, so that it is difficult for the average woman to find practical, clean information concerning her own anatomy and physiological functions concerned with her sex-life. To many it has appeared that the particular organs and parts of the body concerned with the reproductive functions of the woman are base, unclean, and impure, and that any woman discussing them, or seeking information regarding them, must be immoral or at least not "respectable." Anatomical charts and physiological treatises on the subject are tabooed outside of the doctor's office. Women are considered immodest if they seek to acquaint themselves with the facts of life concerning one of their most important classes of physical functions. It is considered "not nice" for a young woman to know anything about her physical being in those phases which play the most important part in her life. Can there be anything more ridiculous and insane? This is a matter which excites the most intense surprise, disgust, and despair in the average person possessing a scientific tendency. But the dawn is breaking, and a better day is ahead of the race concerning these things.

The sex organs of the woman are divided into two classes, as follows: (1) The external organs; and (2) the internal organs. Let us consider each of these classes in turn.

THE EXTERNAL SEX ORGANS OF THE WOMAN.

The external sex organs of the woman are as follows: The Mons Veneris; the Labia Majora; the Labia Minora; the Clitoris; the Meatus Urinarius; and the Vaginal Orifice. The term "the Vulva" is applied to the external sex organs of the woman in general, but more particularly to the Labia Majora and the Labia Minora (the larger and smaller "lips," respectively). The term "Vulva" is the Latin term meaning "folding doors."

The Mons Veneris is the fatty eminence or elevation just above the other external organs, which forms a mount from which its name (literally, "The Mount of Venus") is derived. At puberty it becomes covered with hair.

The Labia Majora are the large "outer lips" or folds of skin which enclose the Vaginal Orifice, and which are situated just below the Mons Veneris.

The Labia Minora are the small "inner lips" of folds of membrane, which are concealed within the Labia Majora, or "outer lips," and are seen only when the latter are parted.

The Clitoris is a small organ, about an inch in length, situated at the upper part of the Labia Minora or "inner lips," and usually being partly or wholly covered by the upper borders thereof. At its extremity it has a small rounded enlargement which is extremely sensitive and excitable, and which is the principal seat of sensation in the woman's sexual organism.

The Meatus Urinarius is the orifice of the urethra of the woman, the purpose of which is to afford an exit for the urine. It is located about an inch below the Clitoris and is just above the Vaginal Orifice. It is a common error among uninformed women that the urine passes out through the Vagina; but this, of course, is incorrect, as the two canals and their respective orifices are entirely separate from each other, though situated closely together.

The Vaginal Orifice is the outer entrance to the Vagina, or Vaginal Canal or Channel. This orifice is located just below the Meatus Urinarius. In the virgin it is usually partly closed by what is known as "The Hymen," (vulgarly known as the "maiden head"), although in many cases the latter is absent even in the case of young girl infants. It was formerly regarded as an infallible sign of virginity, and its absence was regarded as a proof that virginity was lacking. But this old superstition is passing away, for science has shown that the Hymen is often absent even in the case of young children and infants, and, on the other hand, is sometimes present after several years of married life, and even during pregnancy. Much unhappiness has been caused in some cases where the husband has doubted the virginity of his wife because of the absence of the Hymen, but consultation with a capable physician usually removes this misunderstanding.

The Hymen is a membranous fold, sometimes circular in shape, with an opening in the center, though in other cases it extends only across the lower part of the orifice. The opening in the center is for the purpose of allowing the menstrual blood and the other secretions of Uterus and Vagina to flow through. In a few cases this opening is absent, the Hymen being what is called "imperforate"; in which case the girl experiences difficulty when menstruation begins, and a physician is required to make a slit or opening in it. In some girls and women the Hymen is quite tough, while in others it is very thin and is easily broken. In the latter cases the young girl frequently breaks the membrane during vigorous exercise, such as jumping rope, etc. And, as has before been said, in some cases infant girls are born without even a trace of the Hymen. Under the circumstances, it is seen that the presence or absence of the Hymen is far from being an infallible proof of the presence or absence of virginity, and the belief in the same is now regarded as almost a superstition of the past.

THE INTERNAL SEX ORGANS OF THE WOMAN.

The internal sex organs of the woman are as follows: The Vagina; the Uterus and its appendages; the Fallopian Tubes; the Ovaries, and their ligaments, and the round ligaments.

The Vagina is the canal or channel leading from the Vaginal Orifice to the Uterus or womb. It is situated in front of the rectum, and behind the bladder. In length, it averages from three to five inches; and it curves upward and backward, reaching to the lower part of the neck of the womb, or Uterus, which part of the neck is enclosed by it. It is a strong fibro-muscular structure, lined with mucous membrane; and is not smooth inside, but is arranged in inner folds or rings which are capable of great extension.

On either side of the Vagina, near the outer orifice, are two small glands, about the size of a pea, which secrete a peculiar fluid, and which are known as the Glands of Bartholine. The office of the Vagina is that of a complementary to the male organ during the copulative process; to also sustain the weight of the Uterus; to also afford a passage for the infant at the time of its birth; and also to serve as a passage for the menstrual fluid.

The Uterus, or Womb, is the internal sex organ of the woman which serves to hold the fertilized ovum, or egg, from the time of impregnation, during the period of pregnancy during which the ovum develops into the young child, and until the time of the delivery of the child.

The Uterus is a hollow pear-shaped muscular organ, about three inches in length, nearly an inch thick, and about two inches broad across its upper part, or fundus; the lower part, or cervix, being much narrower. The cervix, or "neck" of the womb, projects into the Vagina, forming the "os uteri," or "mouth of the womb," at that point. The Uterus is composed chiefly of a muscular coat, its walls consisting of strong muscular fibres which contract independently of the will, as do similar muscles in the stomach and bladder. These muscular walls are capable of enormous distention during pregnancy. The muscles of the healthy womb are capable of a tremendous pressure and resistance, and are capable of expelling the child with but slight labor at the time of delivery.

The Uterus is located just behind and slightly above the bladder, and is supported by eight ligaments which, in a healthy condition, hold it firmly and easily in place. Displacements of the Uterus are due to the weakening or relaxing of some or all of these ligaments, generally caused by general weakness or else by excessive physical exercise or labor. The principal Displacements of the Uterus are as follows: Prolapsus, or lowering of the womb in the vagina; Antroversion, or the bending forward of the womb; Anteflexion, or the "doubling up" of the womb forward on itself; Retroversion, or the bending backward of the womb; and Retroflexion, or the "doubling up" of the womb backward on itself. Extreme degrees of the last four mentioned forms of displacement often interfere with impregnation.

The internal surface of the Uterus is lined with mucous membrane thickly studded with minute hairlike cells which manifest continuous motion. This motion, in the lower part of the womb, is in the direction of the fundus or upper part of the womb; in the upper part of the womb, the motion is in the opposite direction; the purpose of these opposing movements being to carry the male elements toward that portion of the womb into which the Fallopian Tubes discharge the products of the Ovaries, as we shall see presently.

The Uterus is supplied with follicles around its neck which secrete a very firm, adhesive mucus substance, which serves as a gate or door across the mouth of the womb during the period of pregnancy, and which also serves to prevent the accidental displacement of the ovum or egg. During and just after menstruation, the Uterus becomes enlarged and more vascular. During pregnancy, it largely increases in weight. After delivery, it resumes its normal size, but the cavity is larger than before conception. In old age, it becomes atrophied and denser in structure.

The Fallopian Tubes are the ducts of the Ovaries, and serve to convey the ova, or eggs, from the Ovaries to the cavity in the Uterus. They are two in number, one on each side, each tube being about four inches in length. They extend from either side of the fundus of the womb, through the broad ligaments which hold them and the Ovaries in position until they communicate with the Ovaries. They are lined with a membrane composed of the same kind of peculiar hair-like cells which are found in the lining of the womb, the purpose in this case being to urge forward the ova or eggs toward the Uterus.

At the ovarian end of the tubes the latter expand into a fringed, trumpet-shaped extremity, the fringe being known as "the fimbria." The tubes are only about one-sixteenth of an inch in diameter, and their small caliber makes it easy for them to clog up as the result of slight inflammation, or to become clogged up or sealed at their mouths or openings, thus causing sterility or inability of the woman to conceive. If the tubes are clogged, or sealed up, it of course is impossible for the ova or eggs to reach the uterus.

The Ovaries are the two oval-shaped bodies lying one on either side of the Uterus. In them the ova, or eggs, are formed. They are each about one and one-half inches long, about one inch wide, and about one-half an inch thick. In addition to their attachment to the broad ligament, they are held in position by folds or ligaments running to the fundus of the Uterus and to the fimbriated extremities of the Fallopian Tubes. The Ovaries are covered by a dense, firm coating which encloses a soft fibrous tissue, abundantly supplied with blood-vessels, which is called the stroma. Imbedded in the mesh-like tissue of the stroma are found numerous small, round, transparent vesicles, in various stages of development, known as the Graafian follicles, which are lined with a layer of peculiar granular cells. These Graafian follicles are the receptacles or sacs which contain the ova, or eggs, which constitute the female reproductive germ. Each vesicle contains a single ovum or egg.

Summary.

From the foregoing, it is seen that we may enumerate the sex organs of the woman as follows, proceeding from the external to the internal organism: First, the Mons Veneris, or prominent eminence above the more important external sex organs; then the Labia Majora, or large outer "lips" or folds, which are plainly discernable to the ordinary view; then the Labia Minora, or smaller inner "lips" or folds, and the Clitoris or small sensitive organ, and the Meatus Urinarius or urinary orifice, all of which are discernable only when the folds of the Labia Majora are parted or opened. Then, proceeding upward and backward from the Vaginal Orifice, we find the Vagina, or channel or canal leading to the Uterus or Womb; then we find the Uterus or Womb at the upper end of the canal or channel of the Vagina. Then extending from either side of the Uterus or Womb we find those two important sets of organs known as the Fallopian Tubes, and the Ovaries, respectively. The Ovaries discharge their ova, or eggs, into the Fallopian Tubes, from whence they are conveyed to the Uterus or Womb, with which the tubes are connected and into which they open at its upper and large end.

The Pelvis is that bony arch in the cavity of which are contained the internal sex organs of the woman. The Pelvis is a bony basin which holds and supports the pelvic organs, and is composed of three important parts, as follows: (1) The Sacrum, consisting of five sections of the vertebral column, or spine, fused together so as to constitute the solid part of the lower spine and the back of the Pelvis; (2) the two Hip-Bones, one on each side of the Pelvis; (3) the Pubic Arch, or the front part of the Pelvis, formed by the junction of the two Hip-Bones in front. Attached to the Hip-Bones are the thighs, and also the large Gluteal Muscles which constitute the buttocks, or "seat."

The Pelvis of the woman is quite different from that of the man. It is shallower and wider, and lighter in structure than that of the male, and the margins of the Hip-Bones are more widely separated, thus making the hips of the woman far more prominent than those of the man. Also, the Sacrum is shorter than that of the man, and the Pubic Arch wider and more rounded than his. This difference in the bony structure is made necessary by the demand for larger space in the female Pelvis required for the purposes of childbirth. These differences are not so perceptible in childhood, but become marked and pronounced at puberty.

LESSON III
PHYSIOLOGY OF THE FEMALE SEX ORGANISM

This secondary or "individual" purpose of the Ovaries is that of manufacturing certain secretions which are absorbed by the blood of the woman, and which play an important part in her physical and mental well-being and activities. These secretions begin before puberty in the woman, and continue after her menopause; whereas the manufacture of the ova begins only at puberty, and ceases with the menopause, keeping pace with the manifestation of menstruation in its beginning and its ending.

Nature provides these chemical secretions from the Ovaries for the purpose of giving the woman her characteristic physical form and contour, her form, her breasts, her long hair, her broad pelvis, her soft voice, and other secondary sex characteristics; and also of providing for the normal development of the other sex organs. As a proof of this statement, science shows us that if a woman's ovaries are completely removed there is usually a consequent atrophy or "drying up" of the Uterus and the Vagina, and often even of the Vulva. Moreover, the presence of this internal secretion manifests in arousing and maintaining in the woman her normal sexual desire, and her normal pleasure in the company of her mate; it being noted that if the ovaries are removed, particularly in early life, the woman is apt to lose all sexual desire and normal womanly feeling toward the other sex. And, finally, these secretions make for general physical and mental health and well-being in the woman, and contribute to her vivacity, energy, and activity in all directions. As writers on the subject have well pointed out, this is the reason that capable surgeons usually try to leave at least a portion of the Ovaries when performing an operation for the removal of those organs on account of diseased condition.

The Ovum. The Ovum, or human egg, is a small spherical body, measuring from one two-hundred-and-fortieth to one one-hundred-and-twentieth of an inch in diameter. It has a colorless transparent envelope, the latter enclosing the yolk which consists of granules or globules of various sizes embedded in a viscid fluid. In the center of the yolk is found a very small vesicular body consisting of a tenuous transparent membrane, which is known as "the germinal vesicle;" this, in turn, contains a very tiny granular structure, opaque, of yellow color, known as "the germinal spot."

When the time is reached in which the ovum or egg is to be discharged, the Graafian follicle becomes enlarged by reason of the accumulation of the fluids in its interior, and exerts such a steady and increasing pressure from within, outward, that the surrounding tissue yields to it, and it finally protrudes from the Ovary, from whence it is then expelled with a gush, owing to the elasticity and reaction of the neighboring tissues.

Following this rupture there occurs an abundant hemorrhage from the vesicles of the follicle, the cavity being filled with blood, which then coagulates and is retained in the Graafian follicle. The formation and development of the Graafian follicle begins at puberty and continues until the menopause or "change of life" of the woman. Many follicles are produced, but many do not produce ova, and so gradually atrophy. The ripening and discharge of the eggs produce a peculiar condition of congestion of the entire female sexual organism, including the Fallopian Tubes, the Uterus, the Vagina, and even of the Vulva, which results in a condition of Sexual Excitement. Among the lower animals the female will allow the male to approach her for copulation only at this period, this being the time when the egg is ready for fertilization.

When the female infant is born, her Ovaries contain the germs of about 100,000 ova. The greater portion of these, however, disappear, until at the time of her puberty the number of germs of ova contains only about 30,000 ova. This number is far more than the woman will ever need, and is Nature's provision against diseased portions of the Ovaries, accidents, etc. Only one ovum ripens and matures each month from puberty until menopause, so that the woman really requires only about 300 to 350 ova on the average. This liberality on the part of Nature, however, does not begin to approach her lavishness in the case of seed of the male, for in his case while only one spermatozoon is required to fertilize an ovum (and in fact only one is permitted to do so), we find that in each normal act of ejaculation of semen by the male over 250,000 spermatozoa are projected.

The ripening and discharge of the egg from the Ovaries, and the consequent congestion above referred to, accompanied by what is called Menstruation, occurs regularly each lunar month (28 days). What is called Ovulation consists of the monthly maturing and expulsion of the ripe ovum or egg, while Menstruation (as we shall see later on) consists of the monthly discharge of blood and mucus from the inner surface of the Uterus; the two processes occur in connection with each other, yet neither can be considered as the cause of the other.

Menstruation. It may be well to call your attention at this point to the process known as Menstruation, or "the monthly flow," or "the courses" of women. Menstruation is the monthly flow of bloody fluid which occurs in all healthy (non-pregnant) women from puberty to the menopause or "change of life."

By "Puberty" is meant the age at which a woman begins her period of possible child-bearing experience. In temperate climates the average age of puberty is about fourteen years, while in tropical countries it is often a year or so earlier, and in arctic countries a year or so later. The time, however, depends materially upon the temperament, race, hygiene, and general environment of the individual girl. At this period the girl gradually changes into the young woman. Her figure changes, her bust develops, her hips broaden, and her mental and emotional nature undergoes a change. Also the menstrual flow begins to manifest at this time; at first scanty and irregular, but gradually changing into the characteristic flow each month.

At the period of puberty, the girl undergoes marked emotional changes. She becomes very "emotional" as a rule, and quite "sensitive." She becomes filled with strange, unaccountable longings, ideas, and "notions." She usually manifests a great emotional interest in her girl friends, and often manifests marked jealousy in connection with these friendships. The girl is apt to indulge in day-dreaming at this period, and becomes quite romantic and "flighty." She devours love stories, and delights in imagining herself as the heroine of similar adventures. The period from the beginning of puberty to that of the attainment of full sexual maturity is known as the period of "adolescence," and generally extends to about the age of eighteen in the case of girls.

By the Menopause is meant that period of the woman's "change of life," the average time of which is about the age of forty-five years, although this varies greatly in different individuals. As a rule, it is held that the period of the woman's child-bearing possibility extends over an average period of thirty years. At the Menopause the woman's reproductive activity declines and finally ends. The Ovaries diminish in size, the Graafian follicles cease to form and develop; the Fallopian Tubes atrophy; and there occur other physical, mental, and emotional changes in the woman. While the age of forty-five is held to be the average age at which the Menopause occurs in women, still it is not at all uncommon to find women who menstruate regularly up to the age of fifty, or fifty-two, or even fifty-five, while a large number of women menstruate regularly at the age of forty-eight.

Some women undergo little or no physical or emotional disturbance at the time of the Menopause. In such cases their periods become more or less irregular, with extending intervals between periods; the flow becomes more and more scanty; then several periods are skipped altogether; and finally the periods cease entirely. Other women, however, experience more or less physical disturbance during the years of the "change." They sometimes experience loss of appetite, or a capricious appetite, headaches, loss of weight, or else a sudden taking on of fatty tissue. They often become quite irritable and "notiony," and often become quarrelsome and pugnacious, and in some cases manifest unreasonable jealousy. But, in the opinion of many of the best authorities, much of this trouble comes from the mental expectancy of them by the woman, resulting from the notion that a woman must have these things happen to her. The power of the mind over the body is now well known, and we have here another instance of its effect. The remedy is obvious.

Another matter which disturbs the woman at this time, in many cases, is the common belief that after "the change" she will lose all of her sex attractiveness, and her sexual feelings, etc. This is a grave error, for the experience of all observing physicians is that no such results follow this period of the woman's life. Many women become even more attractive to the other sex after this time, by reason of acquiring a certain maturity and "ripeness" which proves very attractive to many men—often to young men as well as older ones. Moreover, the sexual desires do not cease with the cessation of the reproductive functions. On the contrary, it often happens that such emotions and desires are increased in the woman at, and after, this time of her life. So true is this that this period has been called "The Dangerous Age" for women, and the experience of many a woman of forty-five to fifty will corroborate this statement. The woman at this time should beware of contracting unwise love affairs and entanglements, and of yielding to impulses toward men other than her mate. A word to the wise should be sufficient in this case.

To return to the main subject of Menstruation, it may be said that the monthly flow, when once established, occurs at intervals of every twenty-eight days, on the average, although in some individual cases it occurs as often as every twenty-one days, while in others it occurs as seldom as once in every six weeks, all without exceeding the bounds of normal functioning. Menstruation ceases temporarily during pregnancy, in normal cases, and often also ceases during the period of lactation or nursing. The menstrual period lasts on an average for four or five days, the flow increasing for the first half of the period, and decreasing during the last half. At the beginning of the period there is often manifested a general congestion of all of the sexual organs of the woman, and often of the breasts as well. There is also usually found a sense of physical discomfort, from which more or less irritable feeling arises. In rare cases there are found severe cramps and pains, and in some cases the woman finds it necessary to call in medical aid, or to go to bed, or both. In such cases a cure is often worked by improving the general health, and by observing common sense hygienic rules.

Menstruation is caused by a hypertrophy of the mucus membrane of inner surface of the Uterus, which is followed by a shedding of the hypertrophied membrane. This leaves exposed the underlying vessels, which bleed. New mucus membrane is formed after the period. The menstrual flow consists of a thin, bloody fluid, having peculiar odor, in which is combined blood, thin skin, and mucus membrane, and also mucus from the Uterus and the Vagina, the blood being light in consistency and not clotted.

During the menstrual period the ovum, or egg, is discharged, and enters the Uterus, as we shall see presently.

The Life-History of the Ovum. The physiology of the remaining sexual organs of the woman may perhaps best be studied by considering the story of the Life-History of the Ovum, or human egg, for the functions of such organs are concerned with such life-history of the egg, and really exist merely to create such a history, or rather, to produce the process which constitutes the basis of such history.

The ovum, or egg, when discharged from the ovary, is at first surrounded by a few cells which serve as nourishment, but which soon disappear. It enters the Fallopian Tube and begins its journey toward the Uterus, being urged on its way by the constant movement of the lining-cells of the interior of the tube, in the direction of the Uterus. Certain changes in structure occur. Its passage to the Uterus may be interrupted, and the ovum lost and finally cast off. But the ovum that is successful finally arrives at the Uterus where it awaits impregnation or fertilization by the spermatozoon of the male.

If copulation occurs within a reasonable time after the arrival of the ovum, it is impregnated or fertilized. Fecundation results and conception ensues, the ovum then remaining attached to the walls of the Uterus, and in time develops into the foetus. If, however, the ovum is not impregnated, because of absence of copulation or from other causes, it gradually loses its vitality, and is finally cast off with the several uterine secretions.

It should be explained here that the "spermatozoon" of the male (the plural of the term is "spermatozoa") is the male generative "seed." The sperum, semen, or seminal fluid of the male is filled with hundreds of thousands of spermatozoa. Each spermatozoon is a minute living, moving creature, resembling a microscopic tadpole. It has a head, a rod-like body, and a thin hair-like tail, the latter being kept in constant motion from side to side, by means of which the tiny creature is enabled to travel rapidly from one point to another. The human spermatozoon measures about one six-hundredth of an inch in length. It is composed of protoplasm, the substance of which all living creatures are composed. The spermatozoa are believed to be developed from a parent sperm-cell, by the process of segmentation or subdivision, which process is common to all cell-life. The numerous spermatozoa dwell in a gelatinous substance, which, mingling with the other fluidic secretions of the glands of the male, constitutes the male seminal fluid, sperm, or semen, which is ejaculated by the male during the process of copulation.

Fecundation (i. e. fertilization, impregnation; the process by which the male reproductive element is brought in contact with the female ovum or egg) is brought about by the blending of the male reproductive element (or spermatozoon) with the female reproductive element (or ovum, or egg). This blending is of course accomplished by the bringing together in mutual contact the two reproductive elements just mentioned. The sexual act which results in this "bringing together" of the two elements is known as "copulation," or "coition." In copulation or coition the seminal fluid of the male, containing an enormous number of spermatozoa, is ejaculated from the male intromittent organ into the receptive canal or channel of the female (the Vagina), and in this way finally comes into actual contact with the female ovum or egg which is awaiting it in the Uterus of the female.

The spermatozoa (in the process of copulation) are deposited in the Vagina of the female, usually at its upper end, but sometimes in the lower portion; and in rare and peculiar cases even at or about the Vaginal Orifice or outer vaginal opening. In either case they travel up the remaining portion of the Vagina and finally enter the Uterus or womb. The spermatozoa possess wonderful vitality and power of locomotion. There are cases recorded in which the spermatozoa deposited on or about the outer female genitals have managed to travel inward and upward until they have finally reached the Uterus, where conception has resulted. Such cases, of course, are rare, but they exist, well authenticated and accepted by medical science as facts.

It must not be supposed, however, that the impregnation of the ovum occurs only in the womb proper. Cases are known in which the spermatozoa have traveled along the Fallopian Tubes and impregnated the ovum there; and in very rare cases the spermatozoon seems to have penetrated even to the Ovary itself, and there impregnated the ovum on the surface of the Ovary. Some excellent authorities, in fact, insist that all normal impregnation occurs at the end of the Fallopian Tube—the point of its entrance into the upper part of the womb, rather than in the body of the womb, or at its mouth, as the older authorities taught. But wherever the actual contact of spermatozoon and ovum occurs, the blending of the elements is performed and fertilization, impregnation, or fecundation is accomplished.

As a result of copulation, then, the spermatozoon (or a number of spermatozoa) comes in contact with the female ovum or egg. Then one or more of them, by means of a furious lashing of the tiny tail, manages to penetrate the outer covering of the ovum, and enters the space between the outer covering and the real body of the egg. Several spermatozoa may effect an entrance into this outer space, but only one is permitted to enter the real body of the egg. [Twins are produced by the impregnation of two ova by two spermatozoa, at the same time. The presence of the two ova at the same time is unusual]. The moment that the real body of the ovum is penetrated by the successful spermatozoon, a tough covering or thick membrane forms around the ovum and thus prevents the entrance of other spermatozoa. The successful spermatozoon then loses its tail, and the remaining head and body become what is known as "the male pronucleus."

The authorities are uncertain as to the exact nature of the change which occurs when the ovum is penetrated by the spermatozoon. The outward manifestations of the change and transformation arising from the blending of the male and female elements are of course well known, but the "life process" eludes the power of the microscope. When Nature forms the thick membranous coating over the impregnated ovum, she draws the veil over one of her most important secrets. The first segmentation-nucleus having been formed by the blending and forging together of the male and female pronuclei, the process of segmentation begins.

Segmentation proceeds as follows: the impregnated egg splits into halves, forming two joined cells; then into quarters, forming four joined cells; then into sixteenths, then into thirty-seconds, sixty-fourths, and so on, until the ovum consists of a combined mass of very minute granular-like cells, the whole resembling a mulberry. The segmentation of the nucleus precedes and then continues with the segmentation of the yolk. After the egg has been divided into a great number of these cells, the latter begin a centrifugal action resulting in the formation of a complete inner lining of closely packed cells, with a central cavity filled with the yolk liquid.

In the meantime, the Uterus has been prepared for the reception of the impregnated and transformed ovum. A thick, spongy, juicy, mucus membrane forms, into which the changing ovum passes and attaches itself; the mucus membrane soon enveloping it and shutting it off from the rest of the Uterus. There now appears at one point on the ovum an opaque streak, which is called "the primitive trace" of the embryo—the first beginning of the young living creature. The "primitive trace" then grows in length and breadth. At this point we must leave the history of the ovum, or human egg, for the present; its further development will be related in the succeeding lesson, the subject of which is "Gestation."

LESSON IV
GESTATION OR PREGNANCY

Development of the Impregnated Ovum. In the preceding lesson we terminated our consideration of the impregnated ovum at the point at which, after the process of segmentation, the "primitive trace" had appeared. This primitive trace appears as an opaque streak, or straight line, formed of an aggregation of cells of a distinctive quality. This delicate "trace" or "streak" is the first indication of the form of the coming child. It is the basis, pattern, or mould, in or around which the spinal column is to be formed, and around which the entire young body is to be developed by the wonderful and intricate processes of dividing and reduplication, and the folding and combination of cells. From one end of this "trace" develops the head; from the other end develops the lower end of the spine. At a later stage there appear tiny "buds" in the positions at which the arms and legs should be; these gradually develop, and their ends split into tiny fingers and toes, and finally are transformed into perfect little arms and legs, miniatures of those of the adult human being.

The term "the embryo" is employed to designate the developing young creature in the earlier stages of its development, particularly before the end of the third month of its existence. After the end of the third month the embryo is called "the fetus." In the short space of 280 days the young creature evolves and develops from a single simple cell into a complex organism—a perfect miniature human being. Nature works a wonderful miracle here, and yet so common is it that we take it all as a matter of course, and lose sight of the miracle. From the most simple forms are formed in the developing creature the most complex organs and parts. The heart is formed from a tiny straight line of cells, by enlargement and partition. The stomach and intestines, likewise, develop from a tiny straight line of cells arranged as a tiny tube—the stomach is formed by dilation of one part of the tube, while the large intestine experiences a similar though lesser distention and a greater growth in length; the smaller intestines being formed by growth in length and circumference. The other organs evolve from similar simple beginnings.

The embryo is nourished during its earlier stages by means of the "yolk sack," or "umbilical vesicle," which is outside the body of the embryo, being joined to it by means of the umbilical duct. This yolk sack (originally formed by a "drawing together" in the ovum, which thus separates itself into two portions or areas) is an important feature of the life of the embryo, as it nourishes and sustains it in its earlier stages. Blood vessels form in this yolk sack, and after a time its fluid is absorbed, and after the third month the sack gradually disappears.

After the passing away of the yolk sack, the embryo is nourished and sustained by the "allantois," another peculiar sack which is formed. This sack readily becomes filled with blood-vessels, and serves to nourish the embryo by sustenance obtained from the body of the mother through the walls of the Uterus, a direct communication with the blood-vessels of the mother thus being secured. The blood in the embryo, and that in the mother, come into close contact, thus allowing the embryo to be nourished by the blood of the mother. After a time, in turn, the allantois diminishes and dwindles away, its offices being taken up and performed by the "placenta" or "afterbirth."

The Placenta or Afterbirth. The Placenta, or afterbirth, is a round, flat substance or organ, contained within the Uterus, by which communication and connection is established and maintained between the fetus and the mother, by means of the umbillical cord. It is a flat, circular mass, about seven inches in diameter, and weighing about sixteen ounces. It is attached to the sides of the Uterus of the mother during the period of gestation, and is expelled from the body of the mother, as "the afterbirth," after the birth of the child.

Let us pause a moment, and reconsider the several steps in Nature's plan for nourishing the embryo and fetus. In the first place, as we have seen, there is the yolk sack or umbillical vesicle, filled with a fluid which nourishes the embryo. This gradually disappears in time, and is replaced by the "allantois" which by connection with the walls of the Uterus is enabled to nourish the fetus from and by the blood of the mother. For a short time, however, the embryo is nourished by both the yolk sack and the allantois. Then the allantois assumes the entire task, and the yolk sack passes away. Then, later, the placenta replaces the allantois, and the latter passes away as did its predecessor. The placenta works along the same general lines as the allantois, but is a far more complex way and with a much higher degree of efficiency, as we shall see presently.

The placenta is connected with the body of the fetus by what is known as "the umbillical cord." The "umbillicus" or "navel" in the human being marks the place at which the umbillical cord entered the body of the fetus, from which it was severed after the birth of the child. The purpose of the umbillical cord is to contain and support the umbillical arteries and veins through which the fetus obtains nourishment from the placental substance, and through which the return blood flows. The rich red arterial blood is carried from the placenta to the fetus, and is then distributed over the body of the fetus, nourishing and building it up; the dark venous blood, laden with the waste products of the body of the fetus, is carried back to the placenta, there to be repurified and rendered again rich and nourishing.

The story of the circulation of the blood of the fetus is most interesting. Although the fetal blood is derived from that of the mother, as we have said, yet the maternal blood does not pass directly from the circulatory system of the mother into that of the fetus; nor does the blood of the fetus return directly into the circulatory system of the mother. In fact, the fetal blood never comes in direct contact with that of the mother, or vice versa. The fetus has an independent circulatory system of its own, and yet, at the same time, from the moment of the placental connection until the moment of childbirth, all its nourishment is derived from its mother.

The secret of the above paradoxical statement is made apparent when we understand the meaning of the scientific term "osmosis." Osmosis is "the passage of a fluid through a membrane"; it is a chemical process, caused by the chemical affinity between two liquids or gases separated one from the other by a porous diaphragm or substance. In the process of osmosis in the case before us, the fetal blood takes up nourishing substances and oxygen from the blood of the mother, and passes on to the latter the waste products of the fetal system, by means of passing these substances through the thin porous membranes which separate the two independent systems of blood vessels, i. e., the system of the fetus, and that of the mother. Before birth, in fact, the fetus has its blood nourished and oxygenated by means of the food partaken of by its mother, and the oxygen taken in by the mother in her breathing. After its birth, the infant eats and breathes for itself, and thus nourishes its blood supply directly, instead of receiving it indirectly from the mother.

The Placenta begins to be formed about the third month of gestation, and continues to develop steadily from that time. At the time of the delivery of the child the Placenta covers nearly or quite one-third of the inner space of the distended Uterus of the mother. The total "afterbirth" consists of the Placenta, the umbillical cord, and the remaining membranes of the ovum, all of which are expelled after the birth of the child.

The Amnion. An important appendage contained in the Uterus in connection with the developing fetus is that known as "The Amnion." This is an inner sack which forms within the womb, and which serves to enclose the fetus, and also to sheath the umbillical cord. The Amnion encloses the embryo very snugly during the early stages of its development, but it gradually becomes distended with a pale watery fluid, known as "the amniotic fluid," the purpose of which is to "float" the fetus and to give it mechanical support on all sides. This fluid is composed of water carrying in solution small quantities of albumin, urea, and salt.

Sex in the Embryo and Fetus. It is impossible to determine the sex of the embryo during its early stages. During the fourth week the first traces of the sexual glands appear, but not until the fifth week can the sex be determined even by the microscope. If the embryo is to become a male, certain ducts are transformed into convoluted tubules, and each is attached to the testes which have been formed from the genital nucleus. If the embryo is to become a female, the ducts join to form the uterus and vagina, other portions being transformed into the fallopian tubes and connecting with the ovaries which have been formed otherwise. The outer genitals appear in the early stages of the embryo, but there is no apparent distinction between the sexes, the external organs being the same in all cases, and consisting of a small tubular organ with a small lateral fold of skin on either side. Later, in the male, a groove appears on the under side of this primitive organ, thus forming the urethra, the scrotum being formed from the folded skin at the side. In the female, the primitive organ ceases to develop as in the male, and thus becomes proportionately smaller, and evolves into the clitoris of the female; the two lateral folds, on each side, being transformed into the labia majora, or "outer lips" of the female external genitals.