Progesterone needs to be used for 2 weeks after an IVF transplant, and after 2 weeks, test for pregnancy, and then decide to discontinue the medication or continue it based on the results. Progesterone should be used as prescribed by the doctor for 2 consecutive weeks after an IVF transplant to support the corpus luteum and keep the progesterone level in the body at a relatively high level, which can increase the success rate of the transplant. After 2 weeks of IVF transplantation to detect whether the woman is pregnant, to determine the failure of the transplantation does not need to continue to use progesterone, to determine the success of the transplantation needs to be rechecked in the body of the progesterone, human chorionic gonadotropin levels, the body of the value of progesterone is low to continue to use the progesterone, generally will be used until 10 to 12 weeks of pregnancy. Progesterone can make the uterine mucosa glands grow, thickening of the lining for the implantation of fertilized eggs ready, implantation of fertilized eggs can reduce the excitability of the uterus in pregnancy, inhibit its activities to reduce the occurrence of miscarriage, the continuous use of the placenta to the formation of the placenta, the placenta is formed to take over the luteal body of the ovary secretion of progesterone in sufficient quantities, the fetus in the uterus will be more stable development. It is recommended to use progesterone under the guidance of a doctor after IVF transplantation, do not blindly use and stop the drug yourself.