If you have normal menstruation and suddenly have delayed menstruation, and if you have normal sex, you should first rule out the possibility of pregnancy. It is recommended to use morning urine to do early pregnancy test, if pregnancy has been ruled out, the first consideration is caused by endocrine disorders, such as too much work pressure, often stay up late, insomnia, or changes in the environment, may lead to delayed menstruation. This situation can be clinically oral progesterone to promote menstruation, such as using progesterone gel pills, take once a day, take two capsules a time, take three consecutive days, 3-7 days after stopping the drug will come to menstruation. As progesterone gel pills can cause dizziness, it is recommended to take it orally before going to bed.