The practice of obstetrics, designed for the use of students and practitioners of medicine . ption was3,52 per cent.; twenty to twenty-four years, per cent.; twenty-five totwenty-nine years, per cent.; thirty to thirty-four years, per cent.;thirty-five to thirty-nine years, per cent.; forty to forty-four years, ABORTION, IMMATURE AND PREMATURE LABOR. 347 per cent. From these studies I draw the conclusion that the smallest probabilityof an untimely interruption, of pregnancy is before the twenty-fifth year, and thatthe greatest probability is after the fortieth year.
The practice of obstetrics, designed for the use of students and practitioners of medicine . ption was3,52 per cent.; twenty to twenty-four years, per cent.; twenty-five totwenty-nine years, per cent.; thirty to thirty-four years, per cent.;thirty-five to thirty-nine years, per cent.; forty to forty-four years, ABORTION, IMMATURE AND PREMATURE LABOR. 347 per cent. From these studies I draw the conclusion that the smallest probabilityof an untimely interruption, of pregnancy is before the twenty-fifth year, and thatthe greatest probability is after the fortieth year. Parity.—In the table on page 348 has been arranged the relative frequency ofcases according to the number of preceding labors (-para), added to the numberof mature labors, under primiparae, pluriparae (pluriparas II, III, IV, and Vparae),and multiparae. The table shows that in primigravidae, gestation is least endangered in the firstmonths of pregnancy, and that the frequency of interruption in primigravidae in-creases with the further advance of pregnancy. The table also shows that in. Fig. 482.—Abortion at the TwelfthWeek. First stage. Beginning separa-tion of the placenta and dilatation of thecervix, d, Decidua vera; w, uterine cav-ity; dc, dilated upper portion of cervix;e, external os; p, attached portion ofplacenta; ds, decidua serotina; ps, areaof placental separation; o, cavity ofovum; i, internal os; r, origin of reflexa.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
