An IVF transfer can place two embryos, but it is not applicable to all pregnant women and the exact transfer protocol varies from person to person. How many embryos are placed in an IVF transfer requires a doctor’s judgment based on the type of embryo being placed, the age of the infertile woman, and other factors. If the infertile woman is under thirty-five years of age and the embryos being transferred are cleavage stage embryos, two embryos may be placed. If the infertile woman is over thirty-five years of age, three embryos may be placed at a time during the transfer of cleavage stage embryos to increase the rate of implantation, but the state regulation is that the maximum number of embryos to be transferred during IVF should not be more than three. If a good quality blastocyst is selected for implantation at the time of transfer, then one embryo is usually enough to put in so that multiple pregnancies can be avoided. The chances of embryo malformation, preterm labor, and pregnancy complications will be higher in twin or multiple pregnancies compared to single pregnancies. Pregnant women should follow the doctor’s advice and consider carefully when undergoing embryo transfer. It is recommended to go to a regular medical institution for assisted reproduction operation.