A textbook of obstetrics . the cell-contents and becomes the male pronucleus,—a small, oval body with a striated arrangement of cell-contentsabout it. Finally, the male pronucleus unites with the femalepronucleus. Conception occurs at the moment of this union, andfrom this instant dates the life-beginning of the future embryo,fetus, and infant. The Time when Coitus is Most Likely to Result in Con-ception.—Statistical studies show that impregnation is mostlikely to occur after copulation during the first eight days suc-ceeding the cessation of menstruation. There is a period, begin-ning fourtee
A textbook of obstetrics . the cell-contents and becomes the male pronucleus,—a small, oval body with a striated arrangement of cell-contentsabout it. Finally, the male pronucleus unites with the femalepronucleus. Conception occurs at the moment of this union, andfrom this instant dates the life-beginning of the future embryo,fetus, and infant. The Time when Coitus is Most Likely to Result in Con-ception.—Statistical studies show that impregnation is mostlikely to occur after copulation during the first eight days suc-ceeding the cessation of menstruation. There is a period, begin-ning fourteen days after the cessation of menstruation and lastingfor a week, during which coitus is least likely to be followed by yo PREGNANCY. conception. Some regular women among my patients avoidimpregnation or become pregnant at will, by following or disre-garding this rule. As any woman, however, may ovulate at anytime during the intermenstrual period, this method of preventingconception is by no means invariably Fig- 59-—A, Fertilized ova of echinus : The male a, and the female pronucleus,b, are approaching; in B, they have almost fused ; C, ovum of echinus after com-pletion of fertilization ; , segmentation-nucleus (Hertwig). The Average Date of Conception after Marriage Nor-mally, impregnation should succeed the first menstruationfollowing marriage, but marriages are only called sterile aftereighteen months have elapsed without conception. Pregnancyis possible, however, after years of sterility. I have had undermy care women who conceived for the first time nine, thirteen,and twenty-four years after marriage. INSEMINA TION. 71 45 --f-t- -p- —f- q=_X =t _t_______ 40 — _____S± 30 ^p + 1 \ - -- / \ \l\ 20 44 — 1/ 7H V / 7 \ 1- / \ ; / / \ / i : i\ / / \ / i M / J in ^ ~~ W A ^ vy \ 0 Ji ! \ ^ A - fr+ v\/ . fit P \ _. / \ ^ I T \ /^w^^ i i \s r ir
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectobstetrics, bookyear1
