Obstetrics for nurses / by Joseph B. De Lee.

  • De Lee, Joseph B. (Joseph Bolivar), 1869-1942.
Date:
1913
Catalogue details

Licence: In copyright

Credit: Obstetrics for nurses / by Joseph B. De Lee. Source: Wellcome Collection.

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    mucous membrane of the uterus, and also in nearly every part of the woman’s body. At the very beginning the ovum is a tiny vesicle, hardly visible to the naked eye; in two weeks it has grown to the size of a large pea, and in four weeks to that of a walnut. It is a sac covered with a shaggy coat of deli- cate branched threads called villi. (See Fig. 18.) These villi dip into the uterine surface and bring nutrition and Fig. 21—Two months’ pregnancy, showing the fetus in the uterus (one-half natural size). oxygen from the mother to the child. At this time the child is hardly recognizable as such. At eight weeks the ovum has attained the size of a lemon, and the surface has become differentiated into a protecting part and a nutritive part—the placenta. The villi at one portion of the ovum have grown enormously, are intertwined into a compact mass attached to the uterus, supplied with blood from the maternal circulation, and communicating