It is possible she had PCOS. Although, she never looked like she had a weight problem that often happens with it. Nowadays there are better ways to deal with PCOS.
btw, if anyone here has PCOS there is this aspect:
https://www.smh.com.au/lifestyle/health-and-wellness/bright-side-to-pcos-paradox-20111017-1lt1w.html
“There is perhaps a evolutionary twist to the prevalence of PCOS among women. Since the condition causes women to ovulate less regularly, they tend to have better fertility than other women later on in their reproductive years. In a manner of speaking, their bodies hold on to their eggs, so they last for longer. One evolutionary explanation is that female bodies adapted to times of famine by increasing insulin resistance to save calories and extend the reproductive years.
“PCOS might have been a good thing to have in times of food scarcity because it allowed the window of fertility to be extended and it allowed women to survive and preproduce in low fuel environments. Today we have calories all around us, and yet the body’s possible adaptation to another time still remains for some women. One way to look at PCOS is as a past adaptation gone astray.” Dr. Sarah Berga says, speaking on PCOS at a recent conference.”