The practice of obstetrics, designed for the use of students and practitioners of medicine . Fig. 264.—Diagram Representing theFormation of Marginal PlacentaPrevia. The ovum becomes fixed toone side of the internal os ; the chorionand placenta form, and a marginal pla-centa pr3via results.—(Ahlfeld.) Fig. 265.—Diagram Representing thhFormation of a Central PlacentaPrevia. The ovum becomes fixed justover the internal os; the chorion andplacenta form, and a central placentapraevia results.—(Ahlfeld.) sclerotic contraction of the inflammatory zone in the reflexa, the chorion is forcedinto a sharp
The practice of obstetrics, designed for the use of students and practitioners of medicine . Fig. 264.—Diagram Representing theFormation of Marginal PlacentaPrevia. The ovum becomes fixed toone side of the internal os ; the chorionand placenta form, and a marginal pla-centa pr3via results.—(Ahlfeld.) Fig. 265.—Diagram Representing thhFormation of a Central PlacentaPrevia. The ovum becomes fixed justover the internal os; the chorion andplacenta form, and a central placentapraevia results.—(Ahlfeld.) sclerotic contraction of the inflammatory zone in the reflexa, the chorion is forcedinto a sharp fold at its junction with the surface of the placenta (placentacircumvallata). As in the case of most of these placental anomalies, the 214 PATHOLOGICAL PREGNANCY. essential cause of the marginate and circumvallate forms is to be found in adiseased endometrium, which is responsible for the pathological condition ofthe refiexa. A higher degree of the process which causes the placenta mar-ginata should, in theory at least, interfere with the growth of the placentato such an extent
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectobstetrics, bookyear1
