Ovulatory dysfunction means abnormal, irregular, or absent ovulation.
Chronic ovulatory dysfunction in premenopausal women is caused by PCOD, high prolactin levels, low ovarian reserve, hypothalamic-pituitary dysfunction, and other conditions that can cause anovulation (e.g. diabetes, depression, thyroid dysfunction, obesity, excessive exercise, weight loss, use of drugs that contains estrogen or progestin, etc.)