Ovulation may be caused by endocrine disorders, when the endocrine disorders in the female body, the secretion of luteinizing hormone will drop, which will not be able to maintain the growth and development of follicles, resulting in the inability to ovulate. 2. Insufficient prostaglandins, when the secretion of prostaglandins is insufficient, it will affect the discharge of eggs. 4, may be suffering from hyperprolactinemia, this disease will affect the function of the ovaries, resulting in normal ovulation. 5, related to mental factors, long-term tension and anxiety, ovarian dysfunction can not be normal ovulation.