Вінницький національний медичний університет ім. М.І. Пирогова
By the 17th— 18th day after fertilization three-week pregnancy is an oval fetal bladder, the greater part of which is taken by the fluid separated from the endometrium by smooth chorion and decidual membrane. Inside it there is an embryo in the form of two sacs, amniotic and yolk, connected to the villous chorion with the amniotic stalk ... ................
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