HCG data will be around 100U/L 12 days after blastocyst transplantation. In the process of IVF, blastocysts will implant in 6-7 days after transplantation, and fertilized egg trophoblast cells will start to produce HCG after the gestational sac implantation, and HCG will rise rapidly in the early pregnancy period, and double in about two days or so, which is known as doubling and multiplying, and it is recommended that you should check it through the early pregnancy test paper two weeks after the transplantation or by the blood HCG test to determine whether you have successfully Conception. If the current transplantation of 12 days, the test blood HCG in about 100U / L or within are possible, but the same pregnancy time, the results of HCG between individuals will have a large difference, can not be a HCG test data to determine whether it is normal or not, mainly depends on the dynamic results of the review, if every other day to review the data doubling indicates that it is normal, can be combined with ultrasound to determine the development of the embryo.