Menstruation over ten days still do not come may be related to pregnancy, reproductive system abnormalities, other factors, etc., should be specifically analyzed. 1. Pregnancy: the main manifestation of pregnancy is the cessation of menstruation, and women who have sex should be alerted to pregnancy when their period is delayed for ten days, and need to undergo an early pregnancy test in a timely manner. 2. Abnormalities of the reproductive system: abnormalities of the reproductive system often affect the menstrual cycle, delayed menstruation, such as polycystic ovary syndrome, premature ovarian failure and other diseases can lead to delayed menstruation for more than ten days. It is recommended that patients actively improve the gynecological examination, a clear diagnosis. 3. Other factors: prolonged late night, nervousness and anxiety, environmental changes, taking birth control pills and other factors can also lead to delayed menstruation. It is recommended that women who have delayed menstruation for more than ten days should go to the hospital for examination, so as to clarify the cause of the disease and then carry out targeted treatment.