What is the cause of pcos or pcod?

Unsure: There is no definitive cause for pcos, however the predominant theory is that an increased estrogen level due to peripheral aromatization of androgen precursors in obese women results in anovulation which manifests as pcos.

Hormonal Problem: Pcos is caused by high estrogen (e2)combined with high Insulin which then transforms e2 into testosterone. Excess carbs can elevate both Insulin (via stimulation of pancreas) and e2 (via competitive inhibition of glucoronidase enzyme) a low carb diet reduces both Insulin & e2 thus positively impacting this metabolic disease. Avoid fried foods, veg oils, soy, hfcs, all sugar, excess starches.