Today, influence of the melatonin hormone on the gonadotropic function of the pituitary gland and the process of ovariogenesis is widely studied as e new direction in the studt of reproductive problems of obese women. In addition obesity, which is a co-morbity of polycystic ovary syndrome, and its correlation with melatonin secretion are of interest to many people today. In this article, we talked about the importance of the problem mentioned above.