A System of midwifery : including the diseases of pregnancy and the puerperal state . Formation of decidua completed. VI.] THE UMBILICAL CORD. Ill Pie. 61. ^^T4. Flap of decidua reflexa turned down, dis-elosim? the ovum. jectmg part of the ovum, which is the centre of the everted flap, themembrane has become thin and exsanguine : and here, even at thisearly period, Ave would probably look in vain for the tubular is the commencement of another and an important change whichgoes on, pari passu, with the develop-ment of the placenta. Those villi ofthe chorion which pass towards the de-
A System of midwifery : including the diseases of pregnancy and the puerperal state . Formation of decidua completed. VI.] THE UMBILICAL CORD. Ill Pie. 61. ^^T4. Flap of decidua reflexa turned down, dis-elosim? the ovum. jectmg part of the ovum, which is the centre of the everted flap, themembrane has become thin and exsanguine : and here, even at thisearly period, Ave would probably look in vain for the tubular is the commencement of another and an important change whichgoes on, pari passu, with the develop-ment of the placenta. Those villi ofthe chorion which pass towards the de-cidua serotina are more and more de-veloped, and become imbedded in thelatter, the two together forming theplacenta, an organ to be immediatelydescribed. So soon as this new con-nection is thoroughly established, thevilli over the remaining surface of theovum diminish or cease to grow in thesame proportion; and. as the ovum ex-tends, they become thin and scatteredover that side of the chorion which ismost distant from the placenta, and areultimately absorbed, the external sur-face of the chorion being then perfectly smooth. With this, the deciduareflexa l
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectobstetrics, bookyear1
