. The science and art of midwifery. Fig. 50.—Formation of dccidua completed, a, decidua re-flexa ; b, decidua vera; c, decidua serotina. It is this thickened, vascular, softened mucous membrane whichfurnishes the decidua vera. The ovum, soon after its entry into the uterus, finds a lodgment in one of the folds of thedecidua vera. Thistakes place usually inthe upper portion ofthe uterine cavity, uponthe posterior wall, nearone of the tubal ori-fices. The point of attach-ment between the ovumand the decidua is dis-tinguished as the de-cidua serotina. It isphysiologically important as the site of
. The science and art of midwifery. Fig. 50.—Formation of dccidua completed, a, decidua re-flexa ; b, decidua vera; c, decidua serotina. It is this thickened, vascular, softened mucous membrane whichfurnishes the decidua vera. The ovum, soon after its entry into the uterus, finds a lodgment in one of the folds of thedecidua vera. Thistakes place usually inthe upper portion ofthe uterine cavity, uponthe posterior wall, nearone of the tubal ori-fices. The point of attach-ment between the ovumand the decidua is dis-tinguished as the de-cidua serotina. It isphysiologically important as the site of the placenta. The ovum is not simply adherent. It lies, as it were, imbedded inthe tumefied membrane, folds of which grow up around it, and finallymeet so as to inclose it in a cavity of its own, shut off from the generalcavity of the uterus.* The folds of mucous membrane which inclose the ovum are termedthe decidua reflexa. The space between the decidua vera and reflexa is filled by opaque,viscid mucus. The Placenta.—The vill
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Keywords: ., bookcentury1800, bookdecade1890, bookidsci, booksubjectobstetrics
