Reasons for Cryopreservation
At ReproART, we will generally transfer no more than two embryos to the uterus, even when extra excellent embryos are available. In programs with excellent IVF success such as we have, transfer of more than 2 embryo does not improve chances of pregnancy but does increase the risk of multiple pregnancy, especially triplet pregnancy. (Multiple pregnancy is more dangerous than singleton pregnancy for both the mother and the baby.) Consequently, we cryopreserve (freeze) the attractive embryos remaining after any transfer.
In some cases, when your doctor believes that the uterus is not sufficiently ready, or when progesterone levels are elevated, we may wish to delay your embryo transfer by at least one month and to cryopreserve all of your embryos. Our experience has taught us that success is better using frozen embryos in a later cycle then it is using fresh embryos when the uterus is impaired.
