Progesterone injection is usually continued for 5 to 7 days, and menstruation is resumed about 5 to 7 days after stopping the medication, and the medication should be used in a standardized way according to the doctor’s instructions. Progesterone injection belongs to the progesterone preparation, which has the effect of regulating endocrine disorders in clinical practice, and regulates the menstrual cycle by promoting the proliferation of the endometrium. The injection is usually continued for 5 to 7 days. After the drug is stopped, the endometrium loses the support of progesterone and undergoes shedding to form menstruation, and menstruation usually resumes 5 to 7 days after the injection is stopped. In the process of using the drug, there may be dizziness, pain at the injection site, sodium retention and other adverse reactions, adverse reactions are recommended to consult a doctor in time, if menstruation is not restored after drug treatment, it is recommended to consult a doctor in time.