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The following further account may aid the description thus far given. The ovum, protected by a membrane of its own, called the amnios, descends into the uterus, where it takes its hold of the membranes already there—the decidua. It pushes its way before, as exemplified in the subjoined drawing:—
| a—The decidua lining the womb. b—Do. protecting the ovum. c—The upper part of the womb, where the ovum has become adherent. d—The ovum. View larger image |
a—The decidua lining the womb.
b—Do. protecting the ovum.
c—The upper part of the womb, where the ovum has become adherent.
d—The ovum.
The next cut shows the advanced condition of the fœtus:—