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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.
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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.
The whole funnel — eggs to mature to fertilised to blastocyst to euploid.
Exact calculationArithmetic on the numbers you enter. If your inputs are right, this figure is right.
The attrition funnel tracks eggs retrieved through mature, fertilised, and blastocyst stages. Where a cycle dropped off is more informative than the final number: low maturity points at trigger timing, low fertilisation at sperm or method, low blastocyst conversion at egg quality.
Source — Attrition at each step varies with age and between laboratories. The step rates above are more informative than the overall figure.
That falls in the 15–30% band.
Your result of 25 % sits in the highlighted band. Bands are reference points used alongside clinical findings — not a diagnosis.
Within the range commonly reported across mixed populations.
Attrition at each step varies with age and between laboratories. The step rates above are more informative than the overall figure.
Highlighted is the stage this measurement belongs to. It is a map of the process, not a schedule — timings vary by protocol and by clinic.
The one where your numbers fall furthest below your unit’s typical rate. Low maturity points at trigger timing; low fertilisation at sperm or method; low blastocyst conversion at egg quality.
Some loss at every step is expected. Uniform heavy loss usually reflects egg quality, which tracks age and is not something anyone caused.
The one furthest below your unit's typical rate for your age. If every step is roughly normal and the final number is simply small, the limiting factor was how many eggs you started with — a different conversation from one where a specific step failed.
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.
Compare each step against your own unit’s figures for your age band. 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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