Frozen embryo transfers (FET) have shown comparable success rates to fresh embryo transfers in assisted reproduction. Numerous studies have demonstrated that there is no significant difference in pregnancy rates between frozen and fresh embryo transfers.

One major advantage of FET is that it allows for better timing of the embryo transfer procedure, which can result in a higher likelihood of successful implantation. Additionally, FET can help in avoiding the risk of ovarian hyperstimulation syndrome (OHSS) that can occur during a fresh IVF cycle.

Several factors can influence the success rates of both frozen and fresh embryo transfers, such as the age of the woman, the quality of the embryos, the underlying cause of infertility, and the expertise of the fertility clinic.

In conclusion, both frozen and fresh embryo transfers are effective methods in assisted reproduction techniques, and success rates can be comparable when appropriate techniques are used.