Exam 12: Conception and Prenatal Development

The ability of the fetus to survive outside the uterus is called ___________.

A woman is 16 weeks pregnant with her first baby.She asks how long it will be before she feels the baby move.The best answer is

Sally comes in for her first prenatal examination.This is her first child.She asks you (the nurse),"How does my baby get air inside my uterus?" The correct response is

Very fine hairs,called __________,appear first on the fetus's eyebrows and upper lip at 12 weeks of gestation.By 20 weeks,they cover the entire body.By 28 weeks,the scalp hair is longer than these fine hairs,which thin and may disappear by term gestation.

When explaining twin conception,the nurse points out that dizygotic twins develop from

At approximately _____ weeks of gestation,lecithin is forming on the alveolar surfaces,the eyelids open,and the fetus measures approximately 27 cm crown to rump and weighs approximately 1110g.