Your age
A rough range, not your number
The percentages here are a rough summary of ranges commonly cited across clinical sources for different age groups. Real odds vary hugely by cycle regularity, a partner’s sperm health, timing, and underlying conditions. This is not something you can use to judge your own chances of conceiving.
How the one-year figure is built
If p is the chance in a single cycle, the chance of at least one success across 12 cycles is 1 − (1 − p)¹². That assumes the same independent probability repeats every month, a simplification that will not match reality exactly.
When doctors usually suggest a visit
A common rule of thumb: under 35, try for a year without contraception before seeking help; 35 or older, six months is usually enough reason to see a fertility clinic. Ovarian age matters more the older you get, so it is worth going sooner rather than waiting.
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Frequently asked questions
QWhere do these percentages come from?
They are a rough summary of age-band ranges commonly cited across clinical sources, not measurements from any specific hospital or individual. Personal variation is large.
QWhy isn’t the male partner’s age asked?
Male factors (sperm health) affect the odds too, but this calculator only covers general statistics by female age as a simple reference, so it leaves that out.