Blood tests for HCG are usually done 10-14 days after the IVF embryo transfer to know if you are pregnant. The number of days after transfer depends on the embryos transferred and how early or late the patient was able to get to bed. Usually it takes 5-6 days for the embryos to come to term, although there are cases of delay. The quality of the embryo determines the time of implantation after the transfer. If the implantation is early, the blood HCG value can be taken one week after the transfer, but the test value is often low. Usually, the blood HCG can be measured two weeks after the transfer, and the blood HCG value is more accurate at this time. After in vitro transfer, you should try to lie flat for 48 hours to facilitate embryo implantation, do not do housework and do not lift heavy objects during the period; your diet should be mainly high protein and light; take exogenous progesterone supplementation on time; maintain a good mood, adequate sleep and regular lifestyle habits. Therefore, don’t rush to take the early pregnancy test after transplantation because it is a urine test, which is often a week later than the blood test. It is recommended to check the blood HCG and progesterone after transplantation to determine whether the transplantation is successful. It is important to maintain a good state of mind and eat right. Two weeks after the transplant, blood tests for blood HCG will be taken and the results will be more accurate at that time. However, on the other hand, after the blood HCG is elevated, there is still a possibility that the blood HCG will drop to normal due to the possibility of biochemical pregnancy, so the blood HCG level needs to be checked promptly 2 weeks after embryo transfer to determine whether the transfer is successful.