Parents and siblings of women with polycystic ovarian syndrome are more likely than non relatives to develop insulin resistance. The older relatives are, the more likely they are to develop type two diabetes.
Polycystic ovaries affects 4-19% of women of reproductive age. Type 2 diabetes is significantly higher among both the mothers and fathers of women with polycystic ovaries. Both are over twice as likely to be diabetic compared to matched controls. Type two diabetes is more prevalent in the sisters and brothers of those with polycystic ovaries but was not statistically significant. Fasting insulin levels and insulin resistance were significantly higher in the mothers, fathers and sisters of women with polycystic ovaries.
My comment: Doctors tend to regard polycystic ovaries as a gynaecological condition, but this research indicates that it is a disease of insulin resistance and increased likelihood of type two diabetes in the whole family and does not just affect women, but men in the family as well.
Yilmaz B et al. Diabetes mellitus and insulin resistance in mothers, fathers, sisters and brothers of women with polycystic ovary syndrome: a systematic review and meta-analysis. Fertil. Steril.2018 June 27 doi:10.1016/j.fertnsert.2018.04.024.PMID:29960703