Progesterone to take a few days depending on the purpose of treatment, the type of disease, the specific duration of medication there are some differences, need to follow medical advice medication treatment. Progesterone is mainly a progestin, commonly used in the treatment of irregular menstruation, antifetus, etc.. If it is used to treat irregular menstruation and the endometrium is thicker, it is recommended to take it orally for 5 days; if the endometrium is thinner, estrogen and progesterone deficiency should be considered, progesterone needs to be taken orally for 10 days and estrogen-like drugs should be added if necessary. Generally, the onset of menstruation can occur in about 3-7 days after stopping the medication. Progesterone can also be used for progesterone deficiency in early pregnancy, the specific duration of medication depends on the value of progesterone and clinical symptoms, most need to use the medication until the symptoms disappear or after 11 weeks of pregnancy, pay attention to the regular review during the medication. In addition, it should be noted that oral progesterone should not be discontinued on its own, as it may lead to withdrawal bleeding. It is recommended that the medication be administered under the guidance of a professional doctor to clarify the purpose and duration of the medication.