For example, in a Florida study. tr

For example, in a Florida study. transfer of superovualtetl unfrozen embryos resulted in a pregnancy rate of 29.2% as compared to 13.5% for artificial insemination. In another study, transfer of superovulated frozen embryos achieved a pregnancy rate of 35.4% while artificially inseminated controls were 21.4%. Thus, factors related to survival in the uterine environment have to be considered.