Since the late 1990s we have been able to freeze human eggs successfully. It is imperative that we continue to add to our knowledge base concerning egg freezing and answer some of the difficult questions that are posed by our technical ability to provide this service. This requires that we carefully monitor outcomes in those patients who have frozen eggs and have utilized these eggs to achieve pregnancy. Our understanding of egg freezing outcomes is somewhat limited at this time primarily because many women who have frozen their eggs have not yet used them. Babies born after use of frozen eggs are not yet old enough to have been studied properly.