Fresh embryo 14 days blood HCG value greater than 100mIU/mL is qualified, if less than 100mIU/mL, it does not necessarily mean that the transfer failed, just blood HCG value higher than 100mIU/mL is relatively safe. The human body in the fresh embryo transfer, in 1-3 days blood HCG value will not occur obvious changes, because in this period of time the embryo has not completed the bed, usually in about 5 days after the embryo bed, the human body’s blood HCG value will be doubled to increase, usually in 14 days blood HCG value will rise to more than 100mIU / mL. If it does not exceed 100mIU/mL, there is a high probability that the transfer failed, the embryo did not implant, or the embryo stopped developing after implantation, resulting in a biochemical pregnancy. If ectopic pregnancy occurs, or if the embryo develops slowly due to poor quality, the situation of less than 100mIU/mL may also occur. Fresh embryo transfer for 14 days is the key to determining the success of the transfer, women must pay attention to rest after the embryo transfer, maintain adequate nutritional intake, so as to maximize the success rate of the transfer.