After intercourse during implantation, as long as there are no abnormalities, there is no effect on the embryo. Vaginal bleeding may occur at the time of implantation, but the amount of bleeding is very small and lasts for a short period of about 1-3 days, which is normal. If the bleeding is heavy and lasts for a long period of time, it is considered that the implantation has failed or is unstable, and immediate medical attention is needed to take appropriate treatment measures. After implantation, prohibit sexual intercourse, do not overwork, supplement folic acid to prevent fetal neural tube malformation, eat a light diet, do not eat spicy, stimulating food, do not eat cold food. Pay attention to rest, do not stay up late, supplement vitamins and trace elements. Go to the hospital for regular checkups and blood tests for progesterone and HCG to understand the development of the embryo.