Nursing.—The process of development is not fully complete at birth. The young life is not yet prepared to support itself; hence, still further provision is necessary for it. It requires prepared food suited to its condition. This is provided by the mammæ, or breasts, of the female, which are glands for secreting milk. The fully developed gland is peculiar to the female; but a few instances have been known in which it has been sufficiently developed to become functionally active in men, as well as in young girls, though it is usually inactive even in women until near the close of gestation. It is a curious fact that the breasts of a new-born child occasionally contain milk.

The first product of the mammæ is not the proper milk secretion, but is a yellowish fluid called colostrum . The true milk secretion begins two or three days after delivery.

The lacteal secretion is influenced in a very remarkable manner by the mental conditions of the mother. By sudden emotions of grief or anger, it has been known to undergo such changes as to produce in the child a fit of indigestion, vomiting, diarrhea, and even convulsions and death. Any medicine taken by the mother finds its way into the milk, and often affects the delicate system of the infant more than herself. This fact should be a warning to those nursing mothers who use stimulants. Cases are not uncommon in which delicate infants are kept in a state of intoxication for weeks by the use of alcoholic drinks by the mother. The popular notion that lager-beer, ale, wine, or alcohol in any other form, is in any degree necessary or beneficial to a nursing woman is a great error which cannot be too often noticed and condemned. Not only is the mother injured, instead of being benefited by such a practice, but great injury, sometimes life-long in its consequences, is inflicted upon the babe at her breast who takes the intoxicating poison at second hand, and is influenced in a fourfold degree from its feebleness and great susceptibility.

Having now considered the functions and somewhat of the structures of the principal organs of reproduction, we may obtain a more definite idea of the relation of the several organs of each class by a connected review of the anatomy of the parts.

Male Organs.—As previously stated, the external organs of generation in the male are the penis and the testicles, the latter being contained in a pouch called the scrotum. The penis is the organ of urination as well as copulation. Its structure is cellular, and it contains a vast number of minute coils of blood-vessels which become turgid with blood under the influence of sexual excitement, producing distention and erection of the organ. A canal passes through its entire length, called the urethra, which conveys both the urine and the seminal fluid. The organ is protected by a loose covering of integument which folds over the end. This fold is called the foreskin or prepuce.

The Prostate Gland.—Surrounding the ejaculatory ducts and their openings into the urethra at the base of the bladder is the prostate gland, which produces a peculiar secretion which forms a considerable portion of the seminal fluid, being mingled with the secretion of the testes during its ejaculation. This gland sometimes becomes the seat of somewhat serious disease. In old age it usually becomes somewhat indurated, and often to such an extent as to seriously affect the health and comfort of the individual by interference with urination and by occasioning pain.

Female Organs.—The ovaries, uterus, or womb, Fallopian tubes, and vagina have already been described in part. The external organs of the female are included in the term vulva or pudenda. The most superficial parts are the labia, two thick folds of integument. Just within these are two thinner folds, the labia minora or nymphæ. These, together with the clitoris, situated just above, are extremely sensitive organs, being the chief seat of sexual sense in the female. At the lower part is the opening to the vagina, which in the virgin is usually partially guarded by a thin membrane, the hymen. This is not always a reliable test of virginity, however, as commonly regarded, since it may be destroyed by disease or accident, and may exist even after the occurrence of pregnancy.

Puberty.—For a certain period after birth, the sexual organs remain in a partially developed condition. This period varies in duration with different animals; in some cases being very brief, in others, comprising several years. Upon the attainment of a certain age, the individual becomes sexually perfect, and is then capable of the generative act. This period is called puberty. In man, puberty commonly occurs between the ages of ten and fifteen years, varying considerably in different climates. In this country, and in other countries of about the same latitude, puberty usually occurs at the age of fourteen or fourteen and one-half years in females, and a few months later in males. In cooler climates, as in Norway and Siberia, the change is delayed to the age of eighteen or nineteen years. In tropical climates it is hastened, occurring as early as nine or ten years. In warm climates it is no uncommon thing for a girl to be a mother at twelve; and it is stated that one of the wives of Mahomet was a mother at ten.

Habits of vigorous physical exercise tend to delay the access of puberty. For this reason, together with others, country boys and girls generally mature later than those living in the city by several months, and even a year or two. Anything that tends to excite the emotions hastens puberty. The excitements of city life, parties, balls, theaters, even the competition of students in school, and the various causes of excitement to the nervous system which occur in city life, have a tendency to hasten the occurrence of the change which awakens the sexual activities of the system into life. Hence, these influences cannot but be considered prejudicial to the best interests of the individual, mentally, morally, and physically, since it is in every way desirable that a change which arouses the passions and gives to them greater intensity should be delayed rather than hastened.

Influence of Diet on Puberty.—The dietary has a not unimportant influence in this respect. Stimulating food, such as pepper, vinegar, mustard, spices, and condiments generally, together with tea and coffee, and an excess of animal food, have a clearly appreciable influence in inducing the premature occurrence of puberty. On this account, if on no other, should these articles be prohibited to children and youth, or used very sparingly. Those who advocate the large use of meat by children and youth have not studied this matter closely in all its bearings. While it is true that children and growing youth require an abundance of the nitrogenous elements of food which are found abundantly in beefsteak, mutton, fish, and other varieties of animal food, it is also true that in taking those articles of food they take along with the nutrient elements properties of a stimulating character, which exert a decidedly detrimental influence upon the susceptible systems of children and youth. At the same time, it is possible to obtain the same desirable nitrogenous elements in oatmeal, unbolted wheat flour, peas, beans, and other vegetable productions, which are wholly free from injurious properties. We are positive from numerous observations on this subject, that a cool, unstimulating, vegetable or farinaceous diet would deter the development of the sexual organism for several months, and perhaps for a year or two.

Brunettes Naturally Precocious.—It has been observed that in girls the occurrence of puberty is earlier in brunettes than in blondes; and in general it makes its appearance earlier in persons of a nervous or nervo-bilious temperament than in persons of a lymphatic temperament or phlegmatic nature.

Remarkable Precocity.—Cases occasionally occur in which puberty makes its appearance at the age of three or four years. Indeed, a case has been reported in this country in which a female child possessed all the characteristics which are usually developed at puberty, from birth. In this case the regular periodical changes began at birth.

Premature Development Occasions Early Decay.—A fact which is of too great importance to allow to pass unnoticed, is that whatever occasions early or premature sexual development, also occasions premature decay. Females in whom puberty occurs at the age of ten or twelve, by the time their age is doubled, are shriveled and wrinkled with age. At the time when they should be in their prime of health and beauty, they are prematurely old and broken. Those women who mature late retain their beauty and their strength many years after their precocious sisters have become old, decrepit, and broken down. Thus, the matrons of thirty and forty years in colder climates are much more attractive in appearance than the maidens of sixteen; while quite the reverse is true in this and other countries where sexual development is unduly hastened.

Early Puberty a Cause for Anxiety.—The unnaturally early appearance of puberty is a just cause for apprehension, since it usually indicates an inherent weakness of the constitution. When there are reasons for fearing its occurrence, active measures should be taken to occasion delay if possible. We call especial attention to this point, since there are many who erroneously suppose the early occurrence of puberty to be a sign of superior vigor.

Changes which Occur at Puberty.—The changes which occur in the two sexes at this period have been thus described:—

"In both sexes, hair grows on the skin covering the symphysis pubis, around the sexual organs, and in the axillæ (armpits). In man, the chest and shoulders broaden, the larynx enlarges, and the voice becomes lower in pitch from the elongation of the vocal cords; hair grows upon the chin, upper lip, and cheeks, and often exists upon the general surface of the body more abundantly than in woman." The sexual organs undergo enlargement, and are more frequently excited. The testicles first begin the secretion of the seminal fluid.

"In woman, the pelvis and abdomen enlarge, but the whole frame remains more slender, the muscles and joints less prominent, the limbs more rounded and tapering [than in the male]. Locally, both external and internal organs undergo a considerable and rapid enlargement. The mammæ enlarge, the ovarian vesicles become dilated, and there is established a periodical discharge of one or more ova, accompanied, in most cases, by a sanguineous fluid from the cavity of the uterus."

Menstruation.—The functional changes which occur in the female are much more marked than those of the male. As already intimated, the periodical development and discharge of an ovum by the female, which occurs after puberty, is accompanied by the discharge of a bloody fluid, which is known as the flowers, menses, or catamenia. The accompanying symptoms together are termed the process of menstruation, or being unwell. This usually occurs, in the human female, once in about four weeks. In special cases, the interval may be a week less or a week longer; or the variation may be even greater. Dalton describes the process as follows:—

Nature of Menstruation.—There has been a great amount of speculation concerning the cause and nature of the menstrual process. No entirely satisfactory conclusions have been reached, however, except that it is usually accompanied by the maturation and expulsion from the ovary of an ovum, which is termed ovulation. But menstruation may occur without ovulation, and, vice versa.

Menstruation is not peculiar to the human female, being represented in the higher animals by what is familiarly termed the "rut." This is not usually a bloody discharge, however, as in the human female, though such a discharge has been observed in the monkey.

It has been quite satisfactorily settled that the discharge of the ovum from the ovary generally takes place about the time of the cessation of the flow. Immediately after the discharge, the sexual desires of the female are more intense than at other times. This fact is particularly manifest in lower animals. The following remark by Prof. Dalton is especially significant to those who care to appreciate its bearing:—

"It is a remarkable fact, in this connection, that the female of these [domestic] animals will allow the approaches of the male only during and immediately after the oestrual period [rut]; that is, just when the egg is recently discharged, and ready for impregnation. At other times, when sexual intercourse would be necessarily fruitless, the instinct of the animal leads her to avoid it; and the concourse of the sexes is accordingly made to correspond in time with the maturity of the egg and its aptitude for fecundation."

A Critical Period.—As the first occurrence of menstruation is a very critical period in the life of a female, and as each recurrence of the function renders her especially susceptible to morbid influences, and liable to serious derangements, a few hints respecting the proper care of an individual at these periods may be acceptable.

Important Hints.—1. Avoid taking cold. To do this, it is necessary to avoid exposure; not that a person must be constantly confined in a warm room, for such a course would be the surest way in which to increase the susceptibility to cold. Nothing will disturb the menstrual process more quickly than a sudden chilling of the body when in a state of perspiration, or after confinement in a warm room, by exposure, without sufficient protection, to cold air. A daily bath and daily exercise in the open air are the best known means of preventing colds.

There is no doubt that many young women have permanently injured their constitutions while at school by excessive mental taxation during the catamenial period, to which they were prompted by ambition to excel, or were compelled by the "cramming" system too generally pursued in our schools, and particularly in young ladies' seminaries. It is not to be supposed, however, that the moderate amount of sound study required by a correct system of teaching would be injurious to a healthy young woman at any time, and we have no doubt that a very large share of the injury which has been attributed to over-study during the catamenia has been induced by other causes, such as improper dress, exposure to taking cold, keeping late hours, and improper diet.

Custom of Indian Women.—The ease with which Indian women perform the parturient act is proverbial. They suffer scarcely at all from the pains of childbirth; and without doubt one reason of this is the preservation of their sexual health by rest during the menstrual period. At those seasons they invariably absent themselves from the lodge, and enjoy absolute rest. We may readily suppose, from the nature of some of the Mosaic laws, that a custom somewhat similar prevailed among the ancient Hebrew women. If the hardy women of the forest are benefited by rest, certainly our more delicate females may be thus benefited. All need a degree of rest; with some it should be absolute.

To escape these evil consequences, do this: 1. Establish a regular habit of relieving the bowels daily at a certain hour; 2. Discard laxative and cathartic drugs of every kind; 3. To aid in securing a regular movement of the bowels, make a liberal use of oatmeal, wheat-meal, fruit, and vegetables, avoiding fine-flour bread, sweetmeats, and condiments; 4. Take daily exercise, as much as possible short of fatigue; if necessarily confined indoors, counteract the constipating influence of sedentary habits by kneading and percussing the bowels with the hands several minutes each day; 5. Never resist the calls of nature a single moment, if possible to avoid it. In this case, as in numerous others, "delay is dangerous." Ladies who desire a sweet breath—and what lady does not—should remember that retained feces are one of the most frequent causes of foul breath. The foul odors which ought to pass out through the bowels find their way into the blood and escape at the lungs. A medical man whose sense of smell is delicate soon learns to know a constipated person by the breath. As one says, "What is more offensive than the breath of a costive child?"

(1) Unequal distribution of clothing. The trunk, especially the abdomen and pelvis, is covered with numerous layers of clothing, an extra amount being caused by the overlapping of the upper and lower garments. Very frequently, the amount of clothing upon these, the most vital parts, is excessive. At the same time, the limbs are sometimes almost in a state of nudity. A single cotton garment, or at most one of thin flannel, is the only protection afforded to the limbs beneath the skirts, which often serve no better purpose than to collect cold air and retain it in contact with the limbs. A thin stocking is the only protection for the ankles, and a thin shoe is the only additional covering afforded the feet. Under such circumstances, it is no wonder that a woman catches cold if she only steps out-of-doors on a chilly or damp day.

It is of the greatest importance that careful attention should be given to the proper establishment of the menstrual function at the outset of a woman's life of sexual activity. The first two years will be quite likely to have a deciding influence respecting her health during her whole future life. If a woman can get through the first two years after puberty without acquiring any serious uterine or ovarian disease, she will stand a good chance of enjoying a good degree of sexual health during the balance of her life. The foundation of a great share of the many thousands of cases of uterine disease is laid during this period.

Menorrhagia.—This condition is that in which there is a too profuse discharge of blood. The system is weakened by the loss, and, so much so, in many cases, that the individual does not recover her accustomed strength before the occurrence of the next period, when she becomes weakened still more. By a continuance of this periodical loss, the person may be reduced to a state of almost utter helplessness. A deathly pallor of the countenance, extreme emaciation, loss of strength, and general debility mark the effects of the constant drain upon the system. Thousands of young women continue to suffer in this way year after year, until their constitutions are almost hopelessly wrecked, being deterred by false notions of modesty or delicacy from consulting a proper medical adviser and finding relief.

The observance of a few simple precautions, and the application of proper remedies, will check the unnatural loss in most of these cases very promptly. In the first place, absolute rest, chiefly in a supine position, must be observed not only during the menstrual period, but for a few days previous to its commencement. If this does not restrain the flow, then cool and even cold compresses may be applied to the lower part of the abdomen and to the small of the back. In severe cases no harm will come from the use of an ice-compress, made by inclosing pounded ice between the folds of a towel. Great care must be taken to make the hands, arms, feet, and limbs thoroughly warm by the application of warm bottles and woolen blankets. These measures will scarcely fail to accomplish the desired end, if employed thoroughly and judiciously. It may be well to add just here that the popular fear of using cold in such cases is groundless. No harm can come so long as the extremities are kept warm, and the circulation well balanced. The patient must not be made chilly, however. It is also of importance that the patient be kept mentally quiet as well as physically so.

The douche may be taken at the same time with the bath, or before, as is most convenient. The fountain or syphon syringe should be employed, and the water used should range from 95° to 105°, as best suits the sensations of the patient, being cooled a little toward the last. In general, the hot douche, of a temperature from 100° to 115°, or even 120°, is not only more agreeable, but much more beneficial.

Dysmenorrhoea.—This condition is that in which there is more or less pain and difficulty in connection with the menstrual process. The causes are various, as congestion of the uterus, malformation, and displacement or distortion of the organ. Some of these conditions require the attention of a skilled physician to remedy; but all will be palliated more or less by a course of treatment similar to that described for the previous condition. A warm sitz or hip bath just at the beginning of the period will often give almost magical relief. The application of fomentations over the lower part of the abdomen, and the corresponding portion of the spine, or of hot bags, bottles, etc., in the same localities, is a measure of great utility. The patient should be covered warm in bed, should keep quiet, and great care should be used to keep the extremities well warmed. The use of electricity is a very valuable aid in numerous cases, but this requires the services of a physician, who should always be employed in severe cases when within reach.

Amenorrhoea and Chlorosis.—These are serious disorders which require prompt and vigorous attention. They depend less frequently on disorder of the sexual organs themselves than upon some disorder of the general system. They usually demand the attention of a competent physician, and require a more accurate description of their nature and of proper modes of treatment than we have space to give here.

Hysteria.—From the most remote ages of medical history this disease has been regarded as intimately connected with morbid states of the female organs of generation, especially the uterus. That it is not exclusively produced by causes of this kind is evidenced by the fact that men also sometimes suffer from this curious malady. The phases which it assumes are so numerous that we shall not attempt an accurate description of it; neither is this required, as there are few who are not familiar with its peculiar manifestations. It simulates almost every disease. Even consumption and other formidable maladies have been so completely simulated by this disorder as to deceive physicians of long experience. We have met cases in which young ladies were supposed to be in the last stages of pulmonary disease, were apparently gasping almost their last breath, panting, coughing, and experiencing the usual symptoms which accompany tuberculous disease of the lungs, when, upon making a thorough physical examination of the chest, we could find no evidence of pulmonary disease. In one case we incurred the everlasting displeasure of a young lady by disclosing the real state of affairs; but we were repaid in seeing an immediate disappearance of the symptoms, and complete recovery within six weeks, although the young woman had been considered hopelessly ill by her friends and physicians for six months, and was tenderly watched over, petted, and mourned by friends as one who must soon fall a victim to fell disease.

Prevention Better than Cure.—We might mention numerous other diseased conditions which grow out of inattention to the laws of health relating to the sexual organism; but to dwell longer upon this part of the subject would be to depart from the plan of this work, and we must forbear. This whole class of maladies is noted for obstinacy in great numbers of cases when the morbid conditions have existed for a long time. In addition it should be remarked that some of the most inveterate disorders of the nervous system originate in this same manner. The thousands of ladies who are suffering with spinal irritation, organic disease of the spine and other nervous disorders, are witnesses to this fact. It is apparent, then, that prevention of these serious maladies by attention to sexual hygiene, especially to the hygiene of menstruation at the first establishment of that function, is a matter of gravest importance. In fact, attention to hygiene is about all that is required. With this, drugs will be rarely required; without, they will be utterly useless.

Extra-Uterine Pregnancy.—Sometimes the ovum becomes fecundated before reaching the uterus, and, instead of passing onward into that organ as usual, remains in its position in the Fallopian tube or even on the surface of the ovary. Occasionally an ovum falls into the cavity of the abdomen instead of passing into the tube. Even in this situation it may be fecundated. Impregnated ova thus left in abnormal positions, undergo a greater or lesser degree of development. They commonly result in the death of the mother.

Twins.—The human female usually matures but one ovum at each menstrual period, the two ovaries acting alternately. Occasionally two ova are matured at once. If fecundation occurs, the result will be a development of two embryos at the same time. In rare cases, three or even four ova are matured at once, and by fecundation produce a corresponding number of embryos. As many as five children have been born alive at one birth, but have not lived more than a few minutes.

The occurrence of multiple pregnancies may be explained by the supposition that ova matured subsequent to the first fecundation are also fecundated.

In lower animals, the uterus is often divided into two long segments which afford room for the development of a number of young at once. Some ancient writers make most absurd statements with regard to the fecundity of females. One declares that the simultaneous birth of seven or eight infants by the same mother was an ordinary occurrence with Egyptian women! Other statements still more extravagant are made by writers. For example: A traveler in the seventeenth century wrote that he saw, in the year 1630, in a church near the Hague, a tablet on which was an inscription stating that a certain noted countess gave birth at once, in the year 1276, to 365 infants, who were all baptized and christened, the males being all called John, and the females, Elizabeth. They all died on the day of their birth, with their mother, according to the account, and were buried in the church, where a tablet was erected to their memory.

Monsters.—Defects and abnormalities in the development of the embryon produce all degrees of deviation from the typical human form. Excessive development may result in an extra finger or toe, or in the production of some peculiar excrescence. Deficiency of development may produce all degrees of abnormality from the simple harelip to the most frightful deficiency, as the absence of a limb, or even of a head. It is in this manner that those unfortunate individuals known as hermaphrodites are formed. An excessive development of some parts of the female generative organs gives them a great degree of similarity to the external organs of the male. A deficient development of the male organs renders them very similar in form to those of the female. Redundant development of the sexual organism sometimes results in the development of both kinds of organs in the same individual in a state more or less complete. Cases have occurred in which it has become necessary, for legal purposes, to decide respecting the sex of an individual suffering from defective development, and it has sometimes been exceedingly difficult to decide in a given case whether the individual was male or female.

Hybrids.—It is a well-known law of biology that no progeny result from union of animals of different species. Different varieties of the same species may in some cases form a fertile union, the result of which is a cross between its two parents, possessing some of the qualities of each. The mule is the product of such a union between the horse and the ass. A curious fact is that the offspring of such unions are themselves sterile almost without exception. The reason of this is that they do not produce mature elements of generation. In the mule, the zoösperms are either entirely absent or else very imperfectly developed; hence the fact that a colt having a mule for its sire is one of the rarest of curiosities, though a few instances have been reported. This is a wise law of nature to preserve the purity of species.

Law of Sex.—If there is a law by which the sex of the developing embryon is determined, it probably has not yet been discovered. The influence of the will, the predominant vitality of one or the other of the parents, and the period at which conception occurs, have all been supposed to be the determining cause. A German physician some time since advanced the theory that the two testicles and ovaries produce elements of different sexual character, the right testicle forming zoösperms capable of producing only males, and the right ovary producing ova with the same peculiarity. The left testis and the left ovary he supposed to form the female elements. He claimed to have proved his theory by experiments upon animals. Even if true, this theory will not be made of practical importance. It is, in fact, nothing more than a revival of an old theory held by physicians who flourished more than two thousand years ago.