Embryo transfer is carried out on D3 or D5. The grading of the embryo is important as the selection of the embryo is based on grading. The number of embryos to be transferred depends on the age of the patient. Single embryo transfers(SET) is preferred as the complications for the mother and baby due to multiple pregnancies The patient should report to the clinic(with 6 hours starvation. No anesthesia is necessary usually. The physician identifies the cervix using a vaginal speculum. One or more embryos suspended in a drop of culture medium are drawn into a transfer catheter, a long, thin sterile tube with a syringe on one end. The physician gently guides the tip of the transfer catheter through the cervix and places the fluid containing the embryos into the uterine cavity (Figure 7). The procedure is usually painless, although some women experience mild cramping. A half an hour bed rest may be needed.