Also, said friend is pregnant, and her doctor was talking to her about stuff:

one of those issues is my glucose tolerance test for gestational diabetes which I have most likely failed (I have PCOS, right, which makes you insulin resistant, and getting gestational diabetes with that combo seems to happen to everyone with it, sooner or later; the high-risk OB I saw for a consult says he gets 110 lb skinny Indian ladies who get it this way too; it's not really weight dependent so much as metabolic).

I don't understand any of it, having never had PCOS or been pregnant.