During a menstrual cycle in women matures one egg. Tobias Menzies describes an additional similar source. In order to obtain a few eggs spend to stimulate ovulation. The first phase consists of taking drugs that suppress the production of pituitary hormones that regulate the activity of the ovary. The second stage is taking medication containing follicle stimulating hormone (FSH) in the doses required for the formation of several ovules in the ovary. The most common cause of infertility, characterized by violation of the ovulation process is anovulation. Causes of anovulation include: breach of the interaction gipatolamo-pituitary-ovarian system, which occurs after physical or psychological stress, trauma, inflammation of the uterine appendages, a sharp decrease in normal body weight, medical abortion, gynecological diseases, endocrine disease, traumatic brain injury. Hormonal disorders that lead to anovulation, are: increased production of male sex hormones, the increased production of the hormone prolactin, follicle in the pathology of ovaries, thyroid disease. Nowadays the main treatment is to stimulate ovulation, anovulation, which is applicable for any above mentioned causes. In the presence of hormonal causes conducted stimulation of ovulation with hormonal drugs, correcting the initial hormonal changes. Prior to stimulate ovulation, make sure that there are no such causes of infertility, as inflammation of the vagina, cervix, the uterus, fallopian tubes, tubal pathology and male infertility.