It is a procedure in which embryos frozen from the previous cycle are thawed and transferred. Embryos are typically thawed the morning of the transfer and can be thawed fairly rapidly so that if the desired number does not survive the thaw, additional embryos can be thawed in a short period of time prior to the scheduled embryo transfer. Approximately 70% of good quality day 3 embryos and 95% of Blastocyst embryos survive the thaw. Embryos with less than complete cell survival can result in a normal pregnancy but the probability of a pregnancy is lower.
