My gf is so thin.and skinny... It means she have low oestrogen level...so my question is that if she have low oestrogen level so what time need to fuse her   growth plate (height). Google says after 2 year of mensuration girls stop their height..... It's because of the oestrogen level in girls body.... but if there is a girl who are skinny and who have low oestrogen level so what years need to fuse the growth plate.....