Low progesterone is mainly caused by insufficient luteal function. There are various methods of luteal support, you can progesterone intramuscular injection, 1 day, 1 time 20mg; you can also take oral dydrogesterone, 2 times a day, 1 time 1 capsule; those who vaginally on the drug, such as chenodone, Angiotensin, etc. Luteinizing insufficiency is caused by abnormal ovulation. Ultrasound monitoring of ovulation on the 10th day of menstruation, if there is no ovulation, or small follicle ovulation, follicular luteinization unruptured syndrome, etc., can cause luteal insufficiency and need ovulation promotion treatment. Ovulation-promoting drugs include clomiphene or letrozole, and also intramuscular injection of FSH or HMG. Luteal support should be given after ovulation in order to treat luteal insufficiency.