Fresh and Frozen Embryo Transfers Appear to have Similar Live Birth Rates

The study referenced below looked at 3 years of IVF data in the United States reported to SART (Society for Assisted Reproductive Technology). There does not seem to be much difference in live birth for fresh versus frozen day 5 embryo transfers below age 40 years.

Day 6 fresh blastocyst transfers did not perform as well as frozen day 6 blastocyst transfers. Women age 40 and over may have a slight benefit for frozen day 5 blastocyst transfer over fresh day 5 blastocyst transfer.