Frozen embryo transfer is a reproductive support method, after in vitro fertilization (IVF) creating frozen embryos for a period of time, then transferring the embryos into the woman's uterus (the patient does not have to repeat the ovarian stimulation process).

Although fertilization occurs in the laboratory and embryos develop well in the tube, many women have experienced multiple failures in “in vitro fertilization” (IVF) when transferring embryos on day 5.