4 months without menstrual reasons

If four months do not come menstruation, first of all to see the patient's age, if more than 40 years old, this situation should take into account is caused by poor ovarian function menopause. Because if ovarian function is not good, ovarian secretion of estrogen and progesterone will decline, endometrium will not grow up, this time may cause no menstruation. If it is not pregnancy, it may also be caused by poor endometrial development. In this case, you need to go to the hospital to do B ultrasound to see the thickness of the endometrium.