Embryo transfer is the essence of In Vitro Fertilization. The procedure is performed on the 3rd or 5th days of embryo development. Today, embryo transfer is performed under ultrasound examination with filled up urinary bladder. The embryos are first introduced into the uterus through a thin plastic catheter. The transfer process is an operation not much different from any gynecological examination, which does no require application of any anesthetic. The number of embryos transferred has been limited to 3 by the Turkish Ministry of Health.