Tips the existence of endocrine hormone reasons, including due to late night or mood factors, may cause menstruation delayed more than ten days has not come. First of all, we should also rule out the possibility of pregnancy, if you are pregnant, you will not have a period. In the case of ruling out pregnancy, you can go to the hospital registered gynecologist ultrasound examination to determine the thickness of the uterine lining. The thickness of the lining of the uterus is around 1.1-1.2 centimeters. Oral medication is not recommended, and it is advisable to wait for a few more days, as the period may arrive soon, not more than a week. If the menstruation is delayed for more than ten days, the examination of the endometrium is still relatively thin, only at about 0.8 centimeters, it is recommended to take some oral medications, for example, progesterone, oral 2 times/day, 100mg/time, oral 5 days, and then stop the medication to come to the menstruation, which can be used to promote the menstruation. As far as possible in the first 2-5 days of menstruation to check the hormone six, to rule out the endocrine hormone there is no abnormality, so as to avoid a long time in the future there is the situation of menstruation more than ten days do not come.