When is the best time to take progesterone is related to the purpose of the treatment and needs to be analyzed on a case-by-case basis. If progesterone is used to delay menstruation, it can be taken one week earlier than the expected time of menstruation. When progesterone is used to treat irregular menstruation, it is usually taken after ovulation for 7-10 days. If you want to use progesterone for birth control, the patient must be monitored by ultrasound to determine that it is an intrauterine pregnancy before taking it. Progesterone can also be used to treat abnormal endometrial hyperplasia and is usually taken after ovulation for 10-12 days. Progesterone is a hormone drug, before using the drug need to improve the relevant tests, and then under the guidance of the doctor to take, not arbitrary use. Patients should also pay attention to dietary nutrition, increase the intake of soy products, such as tofu, soy milk, etc., can help to a certain extent to supplement progesterone.