Are the reported pregnancy rates derived from frozen donor eggs or from the patients own eggs?
Some facilities will thaw a large number of eggs in order to bolster pregnancy rates. When many eggs are thawed and fertilized, there are more embryos from which to choose. And while selection of high quality embryos is an important part of the process, using an unnecessary number of frozen eggs is not. This practice also results in the disposal of excess embryos, as they are unlikely to yield a pregnancy if they are frozen and thawed a second time. Be informed about success rates. Ask the right questions.
