The method of taking progesterone after ovulation depends on the patient’s specific condition. If the patient just wants to promote menstrual flow, progesterone can be used for a week after ovulation by taking 100mg orally twice a day, and can be replaced by intramuscular injection of 20mg once a day for 3-5 days. If the patient takes progesterone after ovulation because of luteal insufficiency, the patient needs to take progesterone for about 10 days, twice a day, 100 mg. If the patient has luteal insufficiency and is taking progesterone while preparing for pregnancy. At this point, it is recommended that the patient should keep taking progesterone until the patient is sure that she is pregnant or not, and then decide if she needs to take it or stop it. If the patient is confirmed pregnant, progesterone needs to be continued for fetal retention treatment. If the patient is sure that she is not pregnant, she can stop progesterone and wait for her period to come.