Post-transplant biochemical, clinical symptoms are absent, mainly from the laboratory indicators. When a pregnancy test is performed 14 days after transplantation, the blood HCG value is lower than the value of a normal pregnancy. When the test is repeated in a few more days, the blood HCG is still lower, even down to the normal range, at which point it is judged that the implantation has failed and the pregnancy is biochemical. It is also important to be alert for ectopic pregnancy. Biochemical pregnancy usually manifests as menstruation after the blood HCG drops to the normal range, or in some patients, there is a small amount of vaginal bleeding that drips during the drop of blood HCG, usually without abdominal pain, so there is no need to worry. In this case, the luteal support medication after transplantation can be stopped, because there is no point in continuing the medication and this pregnancy fails. After stopping the medication, wait for your normal period and then wait for the next cycle for the transplant.