In the food deprivation hypothesis, the authors have tried to explain ovulation among obese women who are genotypically PCOS by their rapid weight loss caused at times of seasonal deprivation of food. However, they fail to give a clear explanation of the possible mechanism for a reproductive advantage in this group. Reported interpopulation variation in the phenotypic expression of PCOS occurs in areas where there is not much seasonal food deprivation, 2 which challenges this hypothesis.