The embryo usually starts to implant in 3 to 5 days after the IVF transfer. After 3 to 5 days of IVF, women may experience mild abdominal pain, small amount of vaginal bleeding, breast tenderness, etc. These are all normal phenomena after embryo implantation. However, if you do not feel anything, it does not mean that the embryo has not been implanted, and the specific situation varies from person to person. The trophoblast cells begin to secrete chorionic gonadotropin (HCG) as early as 3 to 4 days after implantation, but the amount of HCG is very small. HCG can be detected in the blood 9 to 10 days after the embryo transfer, which indicates that the embryo has been successfully implanted. In normal life, it is important to eat a well-balanced diet, with plenty of foods high in protein and vitamins. In the first trimester of pregnancy, you also need to take folic acid tablets as prescribed by your doctor to prevent neural tube malformation and other conditions.