The Four Epochs of Woman's Life; A Study in Hygiene

by Anna M. Galbraith

The average duration of pregnancy is ten lunar months, or two hundred and eighty days. The date of the confinement is calculated by reckoning from the date of the last menstrual flow; count backward three months from the date of the first appearance of the last menses; to this add twelve months and seven days, five days being for the average menstrual duration and two days for the possibility of fecundation.

Duration of Pregnancy.— Many difficulties are experienced in determining the date of the expected confinement. As most pregnancies occur in married women, we cannot base any calculations on a single act of coitus. And even if there was but one, all physiologists agree that there is a variable period in different women, and in the same woman at different times, between insemination and the fertilization of the ovum. It is the moment of fecundation, or the union of the germ and sperm cells, which marks the beginning of pregnancy. The uncertainty becomes still greater owing to our inadequate knowledge as to the length of time during which the sexual elements, the ova and the spermatozoa, retain their vitality after liberation from their respective sources. While it is not certainly known, it is probable that the ovum is capable of impregnation any time during its sojourn within the oviduct and before reaching the uterus, or probably for a period of about one week from the time of its escape from the Graafian follicle. The remarkable vitality of the spermatozoa even under less favorable circumstances— direct observation shows that these elements retain their movements for over nine days outside of the body— renders it almost certain that their powers of fertilization are maintained for a long time after they are deposited within the healthy female genital tract; it is believed that the spermatozoa are capable of fertilization after a sojourn of three or more weeks within the oviduct.

Consideration of these facts renders apparent the impossibility of fixing with certainty the date of the beginning of pregnancy, since conception may result from the union of the ovum liberated at the beginning of the period with the spermatozoon introduced at the end of that time; or it may result from the meeting of the male elements already within the oviduct with an ovum discharged a day or two before the occurrence of the menstrual period.

The Signs of Pregnancy.— The cessation of the menstrual period is the sign of the greatest value in women who have been regular; but it must always be remembered that there may be an irregularity of menstruation for the first few months after marriage. The appetite is capricious; morning sickness or nausea in the morning on first getting up is a very common symptom in the early months of pregnancy; enlargement of the abdomen; in the first two months of pregnancy the abdomen is flattened and the umbilicus is depressed; after this the abdomen begins to enlarge. There is also an increase in the size of the breasts, with a deepened color of their areolae and later a watery secretion. The external genitals become swollen and of a bluish color. Feeling of the fetal movements— that is, the movements of the small parts of the child in the womb— by the mother is not always reliable, since gas in the intestines has sometimes been mistaken for this. These signs are more valuable when several exist together.

The nausea and vomiting of pregnancy, the so-called morning sickness, consists of nausea accompanied often by vomiting or retching of a glairy fiuid, showing itself most frequently on rising in the morning, but sometimes appearing after breakfast. It is aggravated by the assumption of the erect position. It may begin within a few days, but as a rule it does not show itself until the fourth week of pregnancy; and it generally ceases about the fourth month, rarely persisting throughout the entire time. In the majority of cases it does not sensibly impair the health. It is a sympathetic disorder reflected from the uterus; it is aggravated by indigestible food, by sexual excitement, and by emotional disturbances; it is most marked in first pregnancies and in women of highly emotional natures. It is not infrequently due to some inflammation of the uterus or erosion about the external orifice, and disappears on the removal of the cause.

Mammary Changes.— During pregnancy the mammary glands are in immediate sympathy with the growing reproductive organs of the pelvis; consequently a genuine physiologic enlargement commences in these organs from the beginning of gestation. Their glandular structure becomes larger, fuller, and firmer; a sensation of weight or pricking is felt by the patient; the veins become more prominent. The nipples also become enlarged, more elongated, and somewhat erect. Surrounding the nipple is the areola; this becomes darker in color.

In most women a drop of watery fiuid, the so-called colostrum, may be squeezed out from the nipple at the end of the third month of pregnancy.

The signs of pregnancy are divided into the presumptive, the probable, and the positive. The presumptive signs are: menstrual suppression, morning sickness, irritable bladder, mental and emotional phenomena. The probable signs are: mammary changes, abdominal enlargement, changes in the neck of the womb, and certain changes which are felt on bimanual examination. The positive signs are: feeling the various parts of the fetus, active movements of the fetus, and hearing the fetal heart sounds.

Functional disturbances of the bladder are quite often noticeable in the early part of the pregnancy. In the first part of the pregnancy the bladder is dragged upon, and later it is pressed upon by the enlarged uterus so that the bladder capacity is lessened and frequency of urination is the result. In the fourth month, when the uterus ascends into the abdominal cavity, these bladder symptoms subside, until the very close of the pregnancy, when by the descent of the now greatly enlarged uterus there may be even incontinence of urine.

Changes in the Abdomen.— During the first two months of the pregnancy there is a flattening of the abdominal surface, due to the descent of the uterus into the pelvic cavity, thus slightly dragging the bladder downward and drawing the umbilicus inward. In the latter part of the fourth month there is noticeable a slight abdominal enlargement, and the umbilicus is no longer sunken. By the end of the fourth month the base of the uterus has risen two inches above the symphysis, and at the end of the thirty-eighth week it touches the lower extremity of the breast-bone; the umbilicus has been for many weeks protruding; during the last two weeks of pregnancy the uterus again descends and the woman feels more comfortable.