Menstruation generally refers to menstruation. Delayed menstruation for more than 10 days and still not coming may be related to pregnancy, drug factors, endocrine disorders, disease factors and so on. 1. Pregnancy: For women who have sex, the possibility of pregnancy exists when menstruation is delayed due to the lack of effective contraception during sex. 2. Drugs: If you take emergency contraceptive pills during this period, it may lead to abnormal changes in hormone levels in the body, which may also cause delayed menstruation. 3. Endocrine disorders: due to excessive emotional tension and anxiety, frequent late nights, environmental changes, etc. may lead to hormonal disorders in the body, resulting in endocrine disorders, manifested in delayed menstruation. 4. Disease factors: some women suffer from polycystic ovary syndrome, hypothyroidism and other diseases, may affect the endocrine, delayed menstruation phenomenon. There are many reasons for delayed menstruation for more than 10 days, so it is recommended to go to the hospital in time to clarify the cause of the disease and then deal with it under the guidance of the doctor.