![]() ![]() An embryo transfer is scheduled at a later date, once the biopsy results have been returned and the female partner has recovered from her egg retrieval. During the first cycle, the embryos are created, biopsied, tested and then frozen. They may want to do so to ensure a balanced representation of the sexes, or for any other reason. This procedure is also used by families who wish to choose the gender of their child. Once the body has had a chance to recover from the stress of IVF and has returned to a more normal cycle, the embryos are thawed and implanted. Instead of implanting embryos while the body is still recovering from IVF, embryos are created and frozen. Delaying embryo transfer until a later cycle allows your hormones to normalize before proceeding and may give you a better chance at pregnancy. How Frozen Embryo Transfer Works With IVFįET is one way that we can avoid desynchronization. In some patients, however, these medications do not work, and they may still have problems with cycle desynchronization. One reason why IVF patients take medications: to suppress progesterone production. This desynchronization between an embryo and endometrial lining reduces the likelihood of a successful implantation. Sometimes, progesterone levels increase too early, and the endometrial lining develops too quickly to support the embryos. This artificially-induced peak in estrogen triggers progesterone production. However, during IVF treatment, the ovaries are stimulated, and estrogen levels peak at much higher levels than in natural cycles. That synchronization between the progesterone response and endometrial lining development creates the best environment for implantation. Because the body produces progesterone in response to ovulation, in ideal conditions, the endometrial lining develops at the right rate to nurture the fertilized egg. Progesterone then triggers the development of the endometrial lining of the uterus.įor a pregnancy to develop, a fertilized egg needs to implant in the endometrial lining and begin to grow. This rise in estrogen triggers ovulation and causes the ovaries to begin producing progesterone. Frozen Embryo Transfer and Desynchronization in IVFĭuring the menstrual cycle, estrogen levels naturally peak just before ovulation. The eggs are transferred in a later cycle to help the woman recover from her current IVF cycle and reduce the effect of desynchronization. A woman can freeze her own eggs or choose to use donor eggs. During this procedure, a woman undergoes the standard IVF procedure, but instead of transferring the embryos back into the uterus in the same cycle, they are frozen for use in a future cycle. It’s gaining popularity due to its safety and pregnancy success rates. Preimplantation Genetic Testing (PGD & PGS)Ī frozen embryo transfer, commonly referred to as FET, is the process of using a frozen embryo from a previous IVF cycle. ![]()
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