H19 and polycystic ovary syndrome: In an association analysis between PCOS risk and H19 imprinted gene polymorphisms in an Iranian population, it was found that PCOS may be associated with imprinted gene polymorphisms, and that the rs2067051G >A allele is associated with a higher incidence of PCOS (odd ratio (OR) = 2.00, 95% confidence interval (CI) = 1.38–2.91, P < 0.01).