Model how many frozen eggs translate into expected embryos and the chance of at least one live birth, with adjustable assumptions.
Result
How to use this tool
Age sets the default live birth rate per blastocyst.
Use mature (MII) eggs, not total retrieved.
Your clinic’s survival, fertilisation and blastocyst rates replace the defaults.
The average and the at-least-one chance answer different questions.
Formula & worked example
At 34, with 15 eggs, 90% survival, 75% fertilisation, 50% blastocyst formation and a 45% live birth rate per blastocyst, each egg has about a 15.2% chance, giving about 2.28 expected live births and about a 91% chance of at least one.
Limitations — read this before you rely on it
Illustrative model only, with broad average defaults. This tool is for education only and is not medical advice, a diagnosis, or a substitute for professional assessment. It is not a personal prediction, does not account for individual medical factors, clinic variation or future treatment changes, and cannot replace fertility counselling.
Frequently asked questions
It depends on age, goals and how many children you hope for. This model lets you test numbers, but a clinic should advise on targets.
Egg quality and live birth per embryo fall with age, so the same egg count gives a lower chance at older ages.
They are broad illustrative averages; clinics vary, so replace them with your clinic’s figures where available.
No. No egg count guarantees a live birth, and later treatment success depends on many factors.
Thawing, fertilisation, embryo development and transfer all happen later; this tool models the whole chain in one calculation.