Generally, progesterone is given for about 10 weeks after embryo transfer. Embryo transfer is generally a process in which an embryo fertilized in vitro is transferred to the uterus so that it can settle and grow and develop on the uterine lining. After embryo transfer, it is necessary to cooperate with professional doctors to inject progesterone to provide luteal support for the embryos, to increase the success rate of conception after the transfer, to ensure that the embryos are successfully implanted, and to promote the growth and development of the embryos. Generally about two weeks after the progesterone injection, you should go to the hospital to check whether you are pregnant. If conception is successful, progesterone injections should be continued until around 10 weeks when discontinuation can be considered. After embryo transfer, if abnormalities such as abdominal pain and vaginal bleeding occur, you should go to the hospital as soon as possible for examination and treatment.