Embryo Transfer Embryo transfer is a simple procedure that follows in-vitro fertilization (IVF) and is often considered the final step of the IVF process. The objective of embryo transfer is to facilitate conception following fertilization from the IVF procedure. A predetermined number of embryos are loaded into a fine transfer catheter that passes through the vagina and cervix, into the uterus. The embryos are deposited from the catheter into the uterus. Embryos are generally transferred anytime between 2 to 5 days after egg retrieval at 2cell stage till blastocyst stage.