![Pregnancy 101 | National Geographic](https://i.ytimg.com/vi/XEfnq4Q4bfk/sddefault.jpg)
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national geographic nat geo natgeo animals wildlife science explore discover survival nature documentary baby pregancy pregnant trimester labor birth Pregnancy 101 PLivjPDlt6ApRfQqtRw7JkGCLvezGeMBB2 PLivjPDlt6ApS90YoAu-T8VIj6awyflIym PLivjPDlt6ApRiBHpsyXWG22G8RPNZ6jlb customs and traditions worldwide three trimesters trimesters delivery developmental process science of pregnancy labor and delivery PLivjPDlt6ApRpidjp1zjROOCKru-89Q1_