That depends on several factors, the most important of which is the age factor. Because your age at the time of freezing is the best indicator of how many of your eggs will be genetically normal. While there is no ‘magic number’ that will guarantee a pregnancy in the future, women 34 and younger can rest assured that preserving 10-12 eggs will increase their chances of having at least a child. For women who are 35-38 years old, about 15 eggs are optimal; for women 38 and older, the data are more limited and less clear.