afox892 t1_jdnog7d wrote
Reply to comment by OneShotHelpful in TIL, the placenta that forms with a fetus isn't created by the mother. It grows from the fertilized egg and some fetuses actually develop outside the uterus attached to the intestines in the body cavity. by darw1nf1sh
There are extremely rare exceptions to pretty much everything.
https://jmedicalcasereports.biomedcentral.com/articles/10.1186/s13256-019-2150-4
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