Polycystic Ovarian Syndrome is a common condition affecting women and the normal functioning of ovaries . Symptoms include irregular periods, excess androgen which may cause physical signs like excess facial or body hair and enlarged ovaries.

New research published in the Journal of the Endocrine Society on September 7th 2023 suggests that ketogenic diets may benefit women with PCOS. Ketogenic diets followed for between 45 and 168 days showed improvements in the  luteinizing (LH) / follicle stimulating hormone (FSH) ratio as well as improvements in serum free testosterone and serum sex hormone binding globulin (SHBG). This is the first meta-analysis of the effect of ketogenic dieting on PCOS. Ketogenic diets reduce hyperinsulinemia  and production of ovarian and adrenal androgens which may explain why a ketogenic diet benefits PCOS.

See publication
https://academic.oup.com/jes/article/7/10/bvad112/7259972?searchresult=1