It is necessary to emphasize this point because we have to realize that the modern movement for surrounding the pregnant woman with tenderness and care, so far from being the mere outcome of civilized softness and degeneracy, is, in all probability, the return on a higher plane to the sane practice of those races which laid the foundations of human greatness.
While rest is the cardinal virtue imposed on a woman during the later months of pregnancy, there are other points in her regimen that are far from unimportant in their bearing on the fate of the child. One of these is the question of the mother's use of alcohol. Undoubtedly alcohol has been a cause of much fanaticism. But the declamatory extravagance of anti-alcoholists must not blind us to the fact that the evils of alcohol are real. On the reproductive process especially, on the mammary glands, and on the child, alcohol has an arresting and degenerative influence without any compensatory advantages. It has been proved by experiments on animals and observations on the human subject that alcohol taken by the pregnant woman passes freely from the maternal circulation to the foœtal circulation. Féré has further shown that, by injecting alcohol and aldehydes into hen's eggs during incubation, it is possible to cause arrest of development and malformation in the chick.[[8]] The woman who is bearing her child in her womb or suckling it at her breast would do well to remember that the alcohol which may be harmless to herself is little better than poison to the immature being who derives nourishment from her blood. She should confine herself to the very lightest of alcoholic beverages in very moderate amounts and would do better still to abandon these entirely and drink milk instead. She is now the sole source of the child's life and she cannot be too scrupulous in creating around it an atmosphere of purity and health. No after-influence can ever compensate for mistakes made at this time.[[9]]
What is true of alcohol is equally true of other potent drugs and poisons, which should all be avoided so far as possible during pregnancy because of the harmful influence they may directly exert on the embryo. Hygiene is better than drugs, and care should be exercised in diet, which should by no means be excessive. It is a mistake to suppose that the pregnant woman needs considerably more food than usual, and there is much reason to believe not only that a rich meat diet tends to cause sterility but that it is also unfavorable to the development of the child in the womb.[[10]]
How far, if at all, it is often asked, should sexual intercourse be continued after fecundation has been clearly ascertained? This has not always been found an easy question to answer, for in the human couple many considerations combine to complicate the answer. Even the Catholic theologians have not been entirely in agreement on this point. Clement of Alexandria said that when the seed had been sown the field must be left till harvest. But it may be concluded that, as a rule, the Church was inclined to regard intercourse during pregnancy as at most a venial sin, provided there was no danger of abortion. Augustine, Gregory the Great, Aquinas, Dens, for instance, seem to be of this mind; for a few, indeed, it is no sin at all.[[11]] Among animals the rule is simple and uniform; as soon as the female is impregnated at the period of œstrus she absolutely rejects all advance of the male until, after birth and lactation are over, another period of œstrus occurs. Among savages the tendency is less uniform, and sexual abstinence, when it occurs during pregnancy, tends to become less a natural instinct than a ritual observance, or a custom now chiefly supported by superstitions. Among many primitive peoples abstinence during the whole of pregnancy is enjoined because it is believed that the semen would kill the fœtus.[[12]]
The Talmud is unfavorable to coitus during pregnancy, and the Koran prohibits it during the whole of the period, as well as during suckling. Among the Hindus, on the other hand, intercourse is continued up to the last fortnight of pregnancy, and it is even believed that the injected semen helps to nourish the embryo (W. D. Sutherland, "Ueber das Alltagsleben und die Volksmedizin unter den Bauern Britischostindiens," Münchener Medizinische Wochenschrift, Nos. 12 and 13, 1906). The great Indian physician Susruta, however, was opposed to coitus during pregnancy, and the Chinese are emphatically on the same side.
As men have emerged from barbarism in the direction of civilization, the animal instinct of refusal after impregnation has been completely lost in women, while at the same time both sexes tend to become indifferent to those ritual restraints which at an earlier period were almost as binding as instinct. Sexual intercourse thus came to be practiced after impregnation, much the same as before, as part of ordinary "marital rights," though sometimes there has remained a faint suspicion, reflected in the hesitating attitude of the Catholic Church already alluded to, that such intercourse may be a sinful indulgence. Morality is, however, called in to fortify this indulgence. If the husband is shut out from marital intercourse at this time, it is argued, he will seek extra-marital intercourse, as indeed in some parts of the world it is recognized that he legitimately may; therefore the interests of the wife, anxious to retain her husband's fidelity, and the interests of Christian morality, anxious to uphold the institution of monogamy, combine to permit the continuation of coitus during pregnancy. The custom has been furthered by the fact that, in civilized women at all events, coitus during pregnancy is usually not less agreeable than at other times and by some women is felt indeed to be even more agreeable.[[13]] There is also the further consideration, for those couples who have sought to prevent conception, that now intercourse may be enjoyed with impunity. From a higher point of view such intercourse may also be justified, for if, as all the finer moralists of the sexual impulse now believe, love has its value not only in so far as it induces procreation but also in so far as it aids individual development and the mutual good and harmony of the united couple, it becomes morally right during pregnancy.
From an early period, however, great authorities have declared themselves in opposition to the custom of practicing coitus during pregnancy. At the end of the first century, Soranus, the first of great gynæcologists, stated, in his treatise on the diseases of women, that sexual intercourse is injurious throughout pregnancy, because of the movement imparted to the uterus, and especially injurious during the latter months. For more than sixteen hundred years the question, having fallen into the hands of the theologians, seems to have been neglected on the medical side until in 1721 a distinguished French obstetrician, Mauriceau, stated that no pregnant woman should have intercourse during the last two months and that no woman subject to miscarriage should have intercourse at all during pregnancy. For more than a century, however, Mauriceau remained a pioneer with few or no followers. It would be inconvenient, the opinion went, even if it were necessary, to forbid intercourse during pregnancy.[[14]]
During recent years, nevertheless, there has been an increasingly strong tendency among obstetricians to speak decisively concerning intercourse during pregnancy, either by condemning it altogether or by enjoining great prudence. It is highly probable that, in accordance with the classical experiments of Dareste on chicken embryos, shocks and disturbances to the human embryo may also produce injurious effects on growth. The disturbance due to coitus in the early stages of pregnancy may thus tend to produce malformation. When such conditions are found in the children of perfectly healthy, vigorous, and generally temperate parents who have indulged recklessly in coitus during the early stages of pregnancy it is possible that such coitus has acted on the embryo in the same way as shocks and intoxications are known to act on the embryo of lower organisms. However this may be, it is quite certain that in predisposed women, coitus during pregnancy causes premature birth; it sometimes happens that labor pains begin a few minutes after the act.[[15]] The natural instinct of animals refuses to allow intercourse during pregnancy; the ritual observance of primitive peoples very frequently points in the same direction; the voice of medical science, so far as it speaks at all, is beginning to utter the same warning, and before long will probably be in a position to do so on the basis of more solid and coherent evidence.
Pinard, the greatest of authorities on puericulture, asserts that there must be complete cessation of sexual intercourse during the whole of pregnancy, and in his consulting room at the Clinique Baudelocque he has placed a large placard with an "Important Notice" to this effect. Féré was strongly of opinion that sexual relations during pregnancy, especially when recklessly carried out, play an important part in the causation of nervous troubles in children who are of sound heredity and otherwise free from all morbid infection during gestation and development; he recorded in detail a case which he considered conclusive ("L'Influence de l'Incontinence Sexuelle pendant la Gestation sur la Descendance," Archives de Neurologie, April, 1905). Bouchacourt discusses the subject fully (La Grossesse, pp. 177-214), and thinks that sexual intercourse during pregnancy should be avoided as much as possible. Fürbringer (Senator and Kaminer, Health and Disease in Relation to Marriage, vol. i, p. 226) recommends abstinence from the sixth or seventh month, and throughout the whole of pregnancy where there is any tendency to miscarriage, while in all cases much care and gentleness should be exercised.
The whole subject has been investigated in a Paris Thesis by H. Brénot (De L'Influence de la Copulation pendant la Grossesse, 1903); he concludes that sexual relations are dangerous throughout pregnancy, frequently provoking premature confinement or abortion, and that they are more dangerous in primiparæ than in multiparæ.