Redpandaling t1_j6khfvj wrote
Reply to comment by zachw055 in TIL When a cow has opposite sex twins, the female twin is usually born intersex and infertile. This happens because the twins blood supplies are linked, which exposes the female to male sex hormones. by awawe
Uterus => heart => lungs => heart => uterus
And of course it's mixing with blood from the rest of the body the whole way
Viewing a single comment thread. View all comments