If you usually have regular periods and your period is delayed, you should check if you are pregnant. If the pregnancy test is negative, it is unlikely that you are pregnant. Pregnancy tests are not always accurate and are sometimes prone to errors. At this time, you can go to the hospital to take a blood test for chorionic gonadotropin to determine whether you are pregnant or not, if the blood test is not pregnant, it may be due to endocrine disorders. Delayed menstruation may also be caused by high work pressure, irregular work and rest, mental stress, depression, anger, excessive diet control, excessive exercise during weight loss, or environmental changes. If there is a delay in menstruation for more than two weeks, you can go to the hospital for an ultrasound examination and choose medication to regulate under the guidance of the doctor. Some women may experience delayed menstruation without pregnancy, which is a false pregnancy phenomenon, due to the urgency to get pregnant and mental stress during the preparation for pregnancy.