Menstruation has been delayed for 10 days has not come may be related to pregnancy, emotional factors, disease factors, medication factors and other reasons, it is recommended that timely consultation to identify the causes, under the guidance of the doctor treatment. 1. pregnancy: as long as there has been a delay in menstruation sex, you need to first rule out pregnancy, in order to clarify the diagnosis can go to the hospital blood test HCG, generally as long as sex more than seven days this test will be able to diagnose whether the pregnancy. 2. Emotional factors: If the patient is too nervous and anxious recently, emotional instability and excessive fatigue, etc., it may affect the patient’s normal endocrine, which will lead to menstruation will be delayed for 10 days. 3. Disease factors: If the patient suffers from polycystic ovary syndrome and hypothyroidism, the endocrine system will also be affected, resulting in a 10-day delay in menstruation. 4. Drug factors: If the patient has recently taken emergency contraceptive pills such as levonorgestrel tablets, mifepristone tablets, etc., the hormone levels will change abnormally after taking the pills, which may lead to disorders in the menstrual cycle, thus resulting in a delay of menstruation for 10 days. When the patient has delayed menstruation for 10 days and has not come, it is recommended that the patient go to the hospital in a timely manner, to clarify the cause of the disease after treatment.