Generally, the fertilized eggs will gradually implant 2-3 days after the transfer of fresh embryos, and no later than 7 days, depending on the period of embryo transfer. The time window for embryo transfer is about 6-7 days after ovulation, when the endometrium is thicker and favorable for embryo implantation. If the embryo is a blastocyst, the implantation will be relatively fast, most of them will be implanted about 2 days after the transfer. If the embryo transferred is a frozen embryo, the time to implantation will be relatively longer, mostly around 3-5 days, but no later than 7 days. The HCG level in the blood will gradually increase around 7-8 days after implantation and pregnancy can be detected by a urine pregnancy test around 10 days after implantation. After the embryo transfer procedure, it is important not to be overly nervous and try to keep a calm state of mind, which is more conducive to embryo implantation and development, and it is recommended to eat more vegetables and protein-rich foods.