Enter your age and optional partner or lifestyle details to estimate age-based pregnancy chances, rough time-to-pregnancy, and fertility-treatment outlooks. This is a planning estimate, not a diagnosis. It cannot measure ovulation, egg quality, sperm factors, tubal factors, or your medical history.
Pregnancy Chance per Cycle
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0.00% per random intercourseKey Fertility Metrics
This estimation does not replace professional medical advice. Always consult a healthcare provider.
How to read your fertility result
The calculator starts with age because age is one of the strongest predictors of natural fertility. It then adjusts for the optional details you enter. Read the result as a planning range, not as a personal forecast.
Chance per cycle
This is usually the most useful number on the page. It estimates the chance of pregnancy over one menstrual cycle, assuming ovulation occurs and timing is reasonably close to the fertile window.
Chance from one act of intercourse
This estimate is lower because one act may not happen near ovulation. Timing matters. ASRM describes the fertile window as the six days ending on ovulation, with the strongest timing usually in the two days before ovulation.
Time to conceive
The month estimate comes from repeated cycles. It does not mean pregnancy is expected by that exact month. Some people conceive quickly at a low estimate; others take longer at a higher estimate.
Egg count and egg quality
The egg-count line is a model estimate. It cannot tell you your actual ovarian reserve. AMH and antral follicle count can add context, but age still matters because egg quality changes with age.
IUI, IVF and egg freezing estimates
The treatment numbers are rough planning estimates. A clinic's result can be very different depending on diagnosis, medication response, sperm factors, egg source, embryo testing, and transfer details.
Fertility by age quick guide
| Age entered | How to read the result |
|---|---|
| Under 30 | Age is usually less limiting, but timing, ovulation, sperm factors and cycle regularity still matter. |
| 30-34 | Results often remain fairly strong, but this is a useful range for comparing "try now" versus "try later" scenarios. |
| 35-37 | Chance usually starts falling faster. If you have been trying for several months, the "when to seek help" result matters more. |
| 38-40 | Age becomes a larger part of the estimate. Treatment-specific calculators may give a clearer next-step view. |
| 41-44 | Natural pregnancy is still possible, but results become more sensitive to individual medical factors. |
| 45-49 | Read the result cautiously. It is mainly useful for broad planning and should not replace medical advice. |
| 50+ | The calculator keeps older hypothetical scenarios available, but it shows very low or not-estimated values where the model is not clinically reliable. |
What this calculator can and cannot tell you
It can help you compare broad scenarios, such as trying now versus later, or natural conception versus IUI, IVF, or egg freezing estimates. It cannot confirm ovulation, diagnose infertility, predict a clinic-specific IVF outcome, or account for every medical factor.
If your cycles are irregular, you have known fertility problems, you have had repeated losses, or you are over 40, a calculator result should not delay medical care. ASRM says fertility evaluation is commonly started after 12 months of trying under age 35, after 6 months at age 35 or older, and sooner when there are known risk factors.
Sources and method notes
The page uses published fertility data and age-based fertility curves to estimate pregnancy chance, egg count, miscarriage risk, and treatment outlooks. Age is important, but it is not the only factor. Ovulation timing, sperm health, tubal factors, diagnosis, egg source, and treatment protocol can all change the result.
Key references include ASRM guidance on natural fertility and fertility evaluation, plus ACOG patient guidance on having a baby after age 35.
Frequently Asked Questions
In the early–mid 20s, per-cycle chance is ~25–30%. It declines through the 30s (~15% by 35), drops faster after 37, ~8% by 40, and ~2–3% by 44. The calculator uses age-specific fecundability curves to reflect this year-by-year change.
It’s a screening threshold, not a cliff. Risks (lower conception odds, higher miscarriage/aneuploidy) rise gradually with age. Our model treats age as a continuum—turning 35 doesn’t halve your odds overnight.
Yes, more modestly. From the early 40s, sperm parameters and DNA integrity trend down, trimming chances and slightly raising miscarriage risk. Entering male age applies small, evidence-based adjustments to the couple’s combined estimate.
AMH reflects egg quantity, not egg quality. Quality (chromosomes) tracks strongly with age, so AMH can’t “cancel” age effects. High AMH may predict stronger IVF response; natural conception still follows age-related egg quality.
Healthy weight, no smoking, moderate alcohol, and regular exercise can improve odds within your age band and reduce time-to-pregnancy—but they can’t stop egg ageing. Think “tune-up,” not “reset.”
Our age curves assume regular ovulation. With PCOS/long cycles, day-to-day timing drives most of the variation. Use ovulation tracking (OPKs/BBT/ultrasound) alongside this age baseline for a more personalised forecast.
No. Hormonal contraception pauses ovulation but doesn’t slow egg ageing. Most users return to their age-matched baseline within 1–3 months after stopping.
Not necessarily. Start with timed intercourse and address modifiable factors (smoking, BMI, thyroid). Many clinicians step-up care: ovulation induction → IUI → IVF, with donor eggs if needed. Seek evaluation earlier as age rises.
Typical couples conceive within 3–6 cycles in their 20s/early 30s; timelines lengthen with age. Our tool shows 3-, 6-, and 12-cycle cumulative chances so you can plan realistically.
<35: after 12 months of trying. 35–39: after 6 months. ≥40: after 3 months—or sooner with irregular cycles, known factors, or recurrent loss.