If there are an excess number of embryos, a decision can be made regarding cryopreservation or freezing. Generally speaking, in a woman under the age of 35, it would be considered appropriate to transfer up to 2-3 embryos. In women 35-40, each program generally individualizes based on their results. In our program we recommend the transfer of 3-5 embryos because we have noticed that the implantation rate is slightly lower. Transferring higher number of embryos would generally improve the pregnancy rate, but will also increase the multiple pregnancy rate.
Embryo transfer is much like a slowly conducted pelvic examination.
A speculum is placed in the vagina. The vagina is cleansed with sponges. A premeasured catheter is then advanced to the very top of the uterus where the embryos are deposited in a very small droplet of fluid. Following embryo transfer, the patient will usually rest quietly for 30 minutes prior to her departure for home. The 30 minute rest interval is not thought to be important.