Fresh embryo transfer transfer can be done 3 to 5 days after egg retrieval, but if you are not suitable for fresh cycle transfer, you need to do frozen embryo transfer after 2-3 months. In vitro fertilization-embryo transfer (IVF-ET) technique is a process in which eggs are removed from a woman’s ovaries, fertilized with sperm outside the body and cultured, and then embryos that have developed to the blastocyst stage are transferred into the uterine cavity, where they are implanted and develop into a fetus with the support of the corpus luteum. It is suitable for people with infertility such as tubal infertility and endometriosis. After egg retrieval if the patient does not have a condition that makes them unsuitable for a fresh cycle transfer, such as risk of ovarian hyperstimulation syndrome, then the transfer can be done 3-5 days after egg retrieval, with 3 days for cleavage stage embryos and 5 days for blastocysts. If there is a higher risk of ovarian hyperstimulation syndrome, or if there are other conditions that make a fresh cycle transfer unsuitable, then the embryos will need to be frozen, and the frozen embryos will be transferred 2-3 months after the egg retrieval procedure. After the embryo transfer must pay attention to proper rest, avoid exertion and strenuous exercise, increase nutrition appropriately, prohibit coitus.