sionnach t1_j6mnp3g wrote on January 31, 2023 at 12:29 PM

Reply to comment by 405134 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

If only that were always true. Twin to Twin Transfusion Syndrome and Twin Anamea Polychthaemia Sequence are pretty horrible things that happen not infrequently in monochorionic (identical) twins.

405134 t1_j6oufl5 wrote on January 31, 2023 at 9:13 PM

Wow , that’s gotta be pretty rare though right? And I’m sure situations where twins are conjoined in the womb also potentially could share blood; like conjoined twins