There is a established link between elevated insulin levels and PCOS
i.e. Ketogenic - Chapter 3 - Endocrine
3.7.3.3 Polycystic ovarian syndrome and infertility / The insulin connection
“is that the three defining features of PCOS (hyperandrogenism causing masculine features, polycystic ovaries and anovulatory cycles) all reflect the same pathophysiology: too much testosterone, ultimately caused by too much insulin.
In other words, too much insulin causes PCOS. Like obesity, PCOS is best understood as a disease of hyperinsulinemia. Although obesity and PCOS do not always occur together, they are both manifestations of an underlying hyperinsulinemia.
The eponymous criterion of PCOS is the presence of multiple cysts in the ovaries, which are derived from the multitude of small follicles. Many women have a few cysts on their ovary, but the sheer number of cysts distinguishes this syndrome from virtually all others. Almost no other much insulin and too much testosterone human disease causes polycystic ovaries. Ultimately, these polycystic ovaries are caused by too.
Both the cysts on the ovaries and the hyperandrogenism are caused by the same underlying problem: too much insulin.
The full book is available on the normal free literature places, but the TLDR is that a diet that reduces insulin levels can be used to treat and reverse PCOS
This is also another more direct (and open) article on the issue: Effects of a ketogenic diet in overweight women with polycystic ovary syndrome - My notes from reading the paper can be found here - https://hackertalks.com/post/13750353