Frozen Embryo Transfer
Frozen Embryo Transfer (FET) is a process of thawing, culturing, and transferring embryos (Blastocysts) into the recipient’s uterus in a separate cycle from the IVF cycle.
In an FET cycle, the patient will not need to undergo ovulation induction or egg retrieval processes. The uterine receptivity will be examined and controlled by careful monitoring of the Fertility specialist. FET cycles usually involve fewer medication and costs are significantly lower as compared to a full IVF cycle.
Frozen embryo transfers also give couples the chance to have IVF cycles that are less costly than creating embryos through fresh new IVF cycles. This is because the thawing of embryos and the transfer process is more economical than a lengthy stimulation, egg retrieval and new IVF cycles.
The success of FET is on an average as good and sometimes better than fresh embryo transfers. The quality of the embryo plays a key role in the thawing process and good quality embryos have a high success rate of implantation.
Very often these days we perform embryo transfers because we have seen it giving us a better success rate.
The embryos are frozen earlier and we see the woman on Day 2 of her cycle. And there are various methods by which the endometrium can be prepared or the uterus can be prepared to receive the embryo.
We commonly use an HRT protocol, where we start estrogen tablets from day 2 and these tablets are given for usually for about 10 days and the patient is reviewed and if the endometrium lining is greater than 8 mm then we start progesterone injections.
And after a period of 3 or 5 days, depending on whether we have a day 3 embryo to transfer or a day 5 embryo to transfer, we plan embryo transfer.
And the pregnancy test is performed about 12 days to 14 days after the transfer.