More on Frozen Embryo Transfer
However, what are a couple’s options if surplus embryos of good quality are available?
Cryopreservation of human embryos is currently available. Moreover, frozen-thawed embryo transfer is a very simple procedure compared to an IVF stimulated cycle because there is no need of gonadotropin administration or taking high hormone doses, avoiding in most cases even injections.
Embryo cryopreservation has become a routine procedure for IVF clinics. If a woman doesn’t conceive during her stimulated cycle and she has cryopreserved embryos available, then she can proceed with her treatment having a frozen-thawed embryo transfer.
Frozen-thawed embryos may be transferred to the uterus around the 18th day of the frozen-thawed cycle. In most cases, the clinical management of frozen embryo transfer cycles involves estrogen administration from day 1 of cycle and then an estrogen – progesterone combination, taken orally, to achieve optimum endometrial thickness and quality.
The success rates of frozen embryo transfer are lower compared to “fresh” cycles. It should be taken into account that some embryos may not survive the thawing procedure “shock”.