Ok-Table-3774
Ok-Table-3774 t1_j6kfp9i wrote
Reply to 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
Yea, it's called a Freemartin. This happens a lot of in cows and other ruminants but not so much human due to how the placenta forms and the blood share. I used to work in a genetics lab that offered freemartin testing to cattle breeders to confirm this. A lot of times the females look normal on the outside but when mating is attempted, it either doesn't happen (no internal vagina), or the mating isn't successful (female is infertile). Sadly most freemartin calves are euthanized.
Ok-Table-3774 t1_iy4t27t wrote
Reply to comment by MsChateau in The logo of my local surf life saving club by sardwondersoup
Because it's a sea lion....or I guess it could be a fur seal as they have external ears.
Ok-Table-3774 t1_iy4ssvx wrote
Reply to comment by sardwondersoup in The logo of my local surf life saving club by sardwondersoup
Not a bear or a seal. Sea lion (it has visible ears). I got my zoology degree just so I could come here and make this comment!
Ok-Table-3774 t1_j6ogp1g wrote
Reply to comment by Kooky-Cry-4088 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
That good to hear! We were told otherwise at the UC Davis Veterinary Genetics Lab when I worked there. It made me pretty sad.