EMBRYOLOGY

Fetal period = ninth week to birth. Pregnancy = 40 weeks after onset of last normal menstrual period (LNMP) or 38 weeks after fertilization. Fetal length = first half of pregnancy. Fetal weight = second half = 50% in last 2 1/2 months = why pregnancy should last as long as possible. Placenta (see Fig. 6.10) Fetal portion = chorion frondosum ... ................
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