The most common cause of Anovulation is:
WHO Classification for Anovulation Hypothalamic pituitary failure: Hypogonadotropic Hypogonadism Hypothalamic pituitary dysfunction/PCOS: Normogonadotropic Hypogonadism Ovarian failure: Hypergonadotropic Hypogonadism Hyperprolactinemia Anovulation and ovulatory dysfunction can be caused by a number of factors. The most common cause of ovulatory dysfunction is PCOS. Other potential causes of irregular or absent ovulation: Obesity Underweight Extreme exercise Hyperprolactinemia Premature ovarian failure Perimenopause, or low ovarian reserves Thyroid dysfunction Extremely high levels of stress
Polycystic Ovarian Disease
Hyperprolactinemia
Premature ovarian failure
Low ovarian reserves
Polycystic Ovarian Syndrome