Home / Calculators / IVF success and prediction / Cumulative live birth
Every calculator in one place, free and with no sign-up. Results show instantly — we don't hide them behind a form. Each one explains what the number means, where the reference ranges come from, and what it cannot tell you.
A calculator sees three or four figures. A specialist sees your history, your scans, your partner's results, and how you actually responded to treatment. If you're between cycles, changing clinics, or something in your results doesn't add up, a second opinion is the fastest way to find out whether anything would be done differently.
Free first consultation. No obligation to start treatment, and it doesn't affect your care at your current clinic.
These tools provide general information and are not a diagnosis or a substitute for assessment by a qualified clinician. Reference ranges and sources are stated on each calculator. Predictive estimates describe groups of people and cannot predict an individual outcome.
A calculator sees three or four figures. A specialist sees your history, your scans, your partner's results, and how you actually responded to treatment. If you're between cycles, changing clinics, or something in your results doesn't add up, a second opinion is the fastest way to find out whether anything would be done differently.
Free first consultation. No obligation to start treatment, and it doesn't affect your care at your current clinic.
How the chance accumulates across three and six cycles. Part of the success calculator.
Population estimateAn average for people with your inputs, not a prediction for you. Individual outcomes vary widely around it.
The chance of at least one live birth across several transfers. Cumulative odds rise with each attempt, which is why single-cycle figures understate what a full course offers.
Source — Calculated as 1 minus the probability of failure raised to the number of transfers, using the HFEA 2023 age bands for live birth per transfer. This treats each transfer as independent, which slightly overstates the true figure: people who do not succeed early tend to have lower per-transfer odds than the age average. Treat it as an optimistic bound, not a prediction.
The bands on this page are drawn from published sources but have not yet been reviewed by our medical team, and some vary by laboratory or assay. Check against the reference range printed on your own report.
At the time of egg collection
Planned or already available embryos
That falls in the above 70% band.
Your result of 73 % at least one live birth sits in the highlighted band. Bands are reference points used alongside clinical findings — not a diagnosis.
Strong cumulative odds. Bear in mind this assumes enough embryos are available for the number of transfers entered.
Calculated as 1 minus the probability of failure raised to the number of transfers, using the HFEA 2023 age bands for live birth per transfer. This treats each transfer as independent, which slightly overstates the true figure: people who do not succeed early tend to have lower per-transfer odds than the age average. Treat it as an optimistic bound, not a prediction.
These tools apply across the process rather than at one point in it.
Because each additional transfer is another chance. Three transfers at 27% each give roughly a 61% chance of at least one live birth, provided embryos are available.
Not entirely. It overestimates, because those who fail repeatedly tend to have below-average odds. Published cumulative rates from real cohorts run somewhat lower than this calculation.
Yes — the figure assumes a transfer actually happens each time. If fewer embryos are available, the realistic cumulative chance is lower.
A calculator sees three or four figures. A specialist sees your history, your scans, your partner's results, and how you actually responded to treatment. If you're between cycles, changing clinics, or something in your results doesn't add up, a second opinion is the fastest way to find out whether anything would be done differently.
Free first consultation. No obligation to start treatment, and it doesn't affect your care at your current clinic.
Assumes each transfer is independent, which makes this an optimistic bound rather than a forecast. Nothing here is a diagnosis or a substitute for assessment by a clinician.
A calculator gives you a number. These explain what it means, and what it does not.
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