Seeksp t1_j6kv63j wrote
Reply to comment by Naxela 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
Grad school is a while ago so I don't remember the specific papers backing it up but that's what we were taught.
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