Patient's question:
Just had eggs retrieved. The doctor recommended that the embryos should develop into blastocysts on the 5th day before being transferred. What is a blastocyst, and is the implantation rate relatively high when transferring a blastocyst?Doctor's answer:
According to your description, the blastocyst is formed on the 5th day of the fertilized egg's growth and development, when the embryo's center forms a cavity. The implantation rate of blastocyst transfer is relatively high. However, in practice, blastocyst culture requires high conditions, and if the embryo's growth and development potential is poor, it may stop growing and development and stagnate at the 3rd day stage. By the 5th day, there may be no embryo left to transfer to the patient.