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The top documents tagged [umbilical cord baby]
Chapter 4: Pregnancy p=9+months+of+gestation+in+20+seconds &n=21&ei=utf-8&js=1&fr=yfp-t- 501&fr2=tab- img&tnr=20&vid=000157394978
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Lesson #3: Having a baby!! Objective: 1. Function of placenta and umbilical cord 2. Main stages of fetus development
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