Freezing your eggs can be a valuable tool for creating options and improving your chances of having a healthy baby, but it’s not a guarantee.
We created the Egg Freezing Calculator to help you develop realistic expectations around egg freezing, and to estimate your frozen egg to baby probability.
It is important to note that while this tool is based on available data from ~3,750 frozen/warmed eggs, ultimately your success will be binary: a woman either achieves a successful pregnancy or not. Every woman’s fertility journey is affected by a number of factors, and each woman should work with her physician to predict the number of eggs she can expect to freeze, understand the likelihood of success at different ages, and use the provided estimates to assist in making the best decision for her future goals. This tool estimates the probability for a pregnancy based on the two largest peer reviewed published studies available, as well as Spring Fertility’s own egg freezing outcomes which are updated regularly.
Briefly, both studies and our data are used to provide an estimated live birth rate per frozen egg. We then assume a normal (binomial) distribution of births among eggs to calculate the chances of having 1 and more than 1 child based on the number of eggs you have frozen and the age at which they were frozen. You can click the “?” next to each result to learn more about the underlying data and how the estimates were calculated.
Our Commitment. We will continue to update and publish our internal data quarterly and we will update the published studies and data as more become available. For now, the consistency of the Cobo et al. and Doyle et al. studies provides a good indicator of chances for success, particularly among women freezing their eggs before their 38th birthday. For women over 37 years old at the time of freezing, data are still limited.