During the IVF process, on the second or the third day the embryos are transferred following the egg retrieval at the four to eight cell stages. For two or three more days, the IVF embryos must continue to grow so that it reaches the blastocyst transfer stage (50-150 cells) before they are ready for the implantation into the endometrium or the uterine wall. Recent advances in IVF labo... https://drritabakshi.in/blastocyst-transfer/