. An American text-book of obstetrics. For practitioners and students. r, that the chorion presentsexternally quite characteristic rugosities whichalone suffice, even when the placenta cannotbe felt either by its surface or at its border,to authorize one in affirming that the pla-centa is near. Causes.—Spiegel berg7 states that pre-vious abortions predispose to placenta prse-via, and that it is more frequent in thepoorer classes, possibly owing to hard workat the beginning of pregnancy, and stillmore to the subinvolution of the uteruswhich is so common in this class. So faras the first stateme
. An American text-book of obstetrics. For practitioners and students. r, that the chorion presentsexternally quite characteristic rugosities whichalone suffice, even when the placenta cannotbe felt either by its surface or at its border,to authorize one in affirming that the pla-centa is near. Causes.—Spiegel berg7 states that pre-vious abortions predispose to placenta prse-via, and that it is more frequent in thepoorer classes, possibly owing to hard workat the beginning of pregnancy, and stillmore to the subinvolution of the uteruswhich is so common in this class. So faras the first statement is concerned, it seems to the writer that both abortions and prsevial tex presentation: the os beginning to placenta should be attributed to a common dllate <Lusk)-cause, a diseased condition of the endometrium. The accident is more fre-quent in multipara than in primiparse—two- or three-fold (Winckel)—andaccording to Muller37 85 per cent, are multipara?. Anomalies of the uterus,such as uterus bicomis and unicornis, cancer and myoma of the uterus, relax-. 588 AMERICAN TEXT-BOOK OF OBSTETRICS. ation of the uterine walls, opening of the oviducts in the lower part of theuterus, as in two cases reported by Ingleby, and, more important than mostand more frequent than any of these, endometritis with hypersecretion, arecauses of placenta praevia. Osiander40 believes that lying on the back favors insertion of the placentaat the fundus, lying upon one side favors a lateral attachment, and standing
Size: 1247px × 2005px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectobstetrics, bookyear1
