Intrauterine embryo transfer is the process by which embryos obtained in the laboratory are placed in the patient’s uterine cavity through a soft cannula. It is an atraumatic procedure that does not require anesthesia. Embryo transfer can be of fresh embryos or previously vitrified embryos. When embryo transfer is carried out with previously vitrified embryos, it is called “frozen embryo transfer” and requires prior endometrial preparation to achieve adequate maturation of the endometrium to allow implantation of the embryo after its devitrification and transfer to the uterine cavity.
