A system of practical medicine. By American authors. Vol. 4

by Unknown

Chronic diseases affect growth and development of the ovum by reason of malnutrition, local and general anæmia. As has before been stated, the impregnation of even a healthy ovule by diseased semen or the semen of a diseased father may result in morbid development, which sooner or later ends in expulsion of the affected ovum. Of the diseases on the part of the father it is more especially—and I may say almost alone—syphilis which exerts a direct influence upon the ovum. Debility of the system is more likely to result in sterility, whilst the ovum, if impregnation takes place by such semen, remains healthy though feeble, and the traces are indelibly marked upon the offspring. The use of liquor, like the morphine habit, may lead to sterility, but not to abortion; though the offspring of a phthisical father rarely escapes, the disease is inherited, but does not develop during the early stages of gestation, and does not affect the ovum in its growth.

Chronic diseases on the part of the mother would seem as if readily leading to abortion, though the result is comparatively a rare one. The diseased, badly-nourished, often anæmic system offers an unfavorable nidus for the rapidly-developing ovum, which is so much in need of healthy and abundant nutrition; but as the feeble, sickly mother often has an abundance of healthy milk for the new-born child, a healthy physiological activity seeming to exist in those parts in the time of functional activity, so may the ovum find a sufficiency whilst other parts are affected. The intense activity existing in the uterus attracts an abundance of the circulating fluid; women low with chronic diseases, phthisis, or cancerous growths, often in the last stages, will bear children, yet they are fortunately not so free to conceive, and if impregnation does occur the healthy growth of the ovum is soon interrupted.

The causes which lead to an enfeebled condition of the system may lead to abortion, whether it be an anæmia, the result of disease or lack of food, of the mode of life, or the locality in which the sufferer lives—of poisonous gases or poisons of other kinds slowly admitted to the system. These poisons, however, whether acute or chronic in the mother, may directly affect the foetus. Lead and noxious gases, like the infection of variola or smallpox, are examples of the latter; more rapidly-acting poisons, like strychnia, opium, carbonic oxide gas, and syphilis, of the former.

Death of the foetus and abortion may result as a consequence of syphilis on the part of either father or mother, or of primary infection during gestation, and are liable to occur at the same period in successive pregnancies; if in the later stages of gestation, the ovum, especially the foetus, bears its characteristic marks. The effects of treatment and improvement are readily visible: abortion is more and more delayed; if the afflicted parent but slowly improves, abortion will occur at a later period during each subsequent gestation until a foetus is carried to term, but stillborn—the next living, perhaps, for a brief period. If vigorous treatment be applied in the early stages, abortion may cease altogether. The results of disease can be more readily seen in the foetus than in other parts of the ovum. The gummata of the placenta, the syphilitic indurations, are difficult to distinguish from other conditions, and appear only at later stages. The syphilitic pemphigus, when occurring upon the foetus, is characteristic, but the mucous membranes are most liable to show its traces. The gummata in the large viscera are frequent, especially in the lungs and liver; but most typical is the osteo-myelitis in the long bones, between epiphysis and diaphysis, a pale-red line in the earlier stages, resulting in a thickening of the parts at later periods.

(2) Causes acting through the Nervous System.—During pregnancy, that stage of intense uterine activity, of gestation and increased growth, we find an increased nervous excitability, motor and vaso-motor, the nerves responding violently to slight causes which would arouse no reaction during the normal condition. There is an increased reflex activity which may lead to a disturbance in the circulation or in the nutrition of the ovum, or to uterine contraction upon some slight excitement. This condition varies exceedingly, the causes which excite these reactions and the extent of the reaction excited differing greatly in degree. Uterine hemorrhage, contractions, and expulsion of the ovum in consequence of neurotic influences are more likely by far to occur during the existence of predisposing causes. Fright, a nervous shock of any kind which in no way affects healthy gestation in a healthy woman, will result in abortion in a person afflicted with uterine disease or in a system otherwise weakened.

The frequent occurrence of abortion in early married life and toward the menopause is mainly referable to nervous influences. Marriage is a period in woman's life comparable to puberty and the menopause—a period of heightened nervous excitability: a change takes place in all the modes of life, and, in addition to the many other causes which at that time unite to interfere with conception, increased nervous excitability is one of the most important, as it is toward the climacterium. We shall consider this period more particularly under the head of Social Causes. As the change of life is approached, the activity of the sexual organs, their nutrition, the blood-supply, and especially the healthy activity of the mucous membrane, are lessened, and hence the growth of the ovum is endangered; but the condition of the nervous system at this period certainly has an equally powerful influence in producing the tendency to abortion. During this hyperæsthesia an existing predisposing cause or some slight additional excitement will arouse the vigorous action of the tensely-strung vaso-motor nerves; coitus even at these periods may be looked upon as dangerous to continued gestation. It is not alone the traumatic influences which must be considered, but the effect upon the nervous system as well, especially the vaso-motor nerves, in the state of intense excitement which accompanies the sexual orgasm. During these periods of increased nervous tension during pregnancy coition is more liable to produce abortion than at other times. It is in the coming together of numerous causes that one more intense than the others, though harmless alone, will be followed by sudden response.

Much has been said as to the injurious effect of coition during pregnancy. Those who look to physical causes as mainly tending to abortion claim the injurious effect to be purely physical, traumatic; whilst others, and I believe more justly, claim that the influence is strictly neurotic. Parvin says that coition is so frequent a cause that he blames upon this half the cases which are termed spontaneous abortions; certainly it has a most unfortunate effect, so that we frequently see the expulsion of a healthy ovum from the second to the fourth month in young women recently married, mainly in the higher walks of life and among delicately organized women, who are more intensely sensitive to the great change which they have undergone. I have repeatedly had occasion to see these unfortunate cases, and almost look for the occurrence of an abortion within the first six or eight months after marriage in the bride of fashionable society. Though the statement of Parvin may seem somewhat forcible, the fact is not to be ignored: the ovum expelled in such an abortion gives evidence of being of healthy growth, so that the cause must not be sought for in malnutrition or local disease. The laws of many peoples are as strict in regard to coition during pregnancy as they are about the care of menstruating women: by some it is forbidden; among the ancient Mexicans it was regulated, it being ordained that sexual intercourse should be exercised to a moderate extent during pregnancy in order that the healthy development might be furthered and strength given to the child. The injurious effect of coition is everywhere acknowledged, and, I can say, not unjustly. Total abstinence was looked upon by the Mexicans and other peoples as likewise harmful.

The changes wrought in the nervous and physical condition of women after marriage and toward the menopause are such that the menstrual periodicity is interfered with, dysmenorrhoea sometimes existing, at times menorrhagia, so that the expulsion of an ovum of from eight to ten weeks is ignored, passing away with the clots of a profuse menstrual flow: it is often not even known to the mother, being considered by herself and family as merely a profuse flow; the accompanying pains are often no greater than those of the dysmenorrhoea common at such times; no precautious are taken, and thus the foundation is often laid for uterine disease.

We know that the emotions—fright, fear, joy—may check the menstrual flow or produce menorrhagia; in the gravid uterus hemorrhage may be caused or contractions aroused, and abortion results. In a misled girl or a young married woman the fear of pregnancy may frequently cause cessation of the menstrual flow: the effect of the mind and nervous system upon these organs is equally evident in the cessation of the menses when pregnancy is longed for, though it does not exist: I have even known of the summoning of midwife and physician by an aged bride with distended abdomen (gastric hystero-neurosis) who longed for pregnancy and thought she felt uterine contraction and the inauguration of labor. As the emotions affect the general health, the ovum may likewise suffer as a part of the maternal system; but when they are sudden, such as by fright or shock, the effect upon the vaso-motor centres by reflex action is so forcible that the uterine vessels are paralyzed, dilated, and hemorrhage follows; or a tetanic contraction of the vessels may result, and then the nutrition of the embryo is checked.

The evil effect of nursing during pregnancy is due in part to the withdrawal of nutrition from the ovum, but in part to the contraction of the uterus and its vessels, which may result as a reflex symptom from the irritation of the nipples, and thus cause abortion. The frequent occurrence of abortion upon ships at sea is due in part to traumatic influence, the vomiting of sea-sickness; in part it is neurotic, due to the changed mode of life, the leaving of a home by the emigrant for foreign lands, just as the menstrual flow is stopped for months and months in the immigrant girl upon her first arrival in a strange country.