The decision of whether it is better to transfer fresh embryos or blastocysts for IVF is made on a case-by-case basis. When sperm and egg combine in a petri dish to form a fertilized egg, it usually splits into an embryo on the third day, and if the transfer is performed at this time, the situation is called a fresh embryo transfer. If the embryos are not transferred on the third day, but continue to be cultured in vitro for 2-3 days before being transferred, this is called a blastocyst transfer. It is not possible to accurately determine which one is better between the two, because the success of IVF transfer is related to many factors, such as age, embryo quality, ovarian function and so on. But relatively speaking, the success rate of blastocyst transfer is slightly higher, but not absolutely. Women should pay more attention to rest after the transfer, do not do strenuous exercise, and do not eat spicy and stimulating food in diet. If there are any uncomfortable symptoms, you need to consult a doctor in time.