The Dublin practice of midwifery / By Henry Maunsell.

  • Henry Maunsell
Date:
1834
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Licence: Public Domain Mark

Credit: The Dublin practice of midwifery / By Henry Maunsell. Source: Wellcome Collection.

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    would itself (from its plastic nature) increase in a ratio with the increase of the ovum. In a short time this bag of decidua reflexa would be pressed against some part of the uterine wall (most pro- bably in the vicinity of the fundus), and there meeting with a membrane exactly similar to itself (the decidua vera), a vascular union would very soon be established. The result of this union would soon be a minute anastomosis of vessels, and a formation of membranous tissue to support them, between the two deciduae, and, in process of time, the elaboration of a perfect placenta. ‘ We have now disposed of the principal contents of the gravid uterus, and shall merely allude to two structures, to which great importance has been attached by some, but which, in reality, are very imperfectly understood. The vesicula umbilicalis is a small body, not ex- ceeding in size a small pea, which lies between the chorion and amnion, near the margin of the pla- centa. It is connected with the intestines of the foetus, by a duct denominated the vitelline pedicle, which runs along the funis; and is also connected with the mesenteric vessels by an artery and vein, called the omphalo-mesenteric, which accompany the vessels of the cord through the umbilicus. The vesicle contains a small quantity of a kind of oily matter, supposed to perform a part in the early nutrition of the embryo : but the fact is, we know nothing about the matter.
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