Miscarriage Risk Estimator

Enter a few details below to see general statistical averages from published research. This gives population-level estimates, not a personal prediction.

Age (years)

Weeks pregnant

Counted from the first day of your last menstrual period. Estimates cover 4–20 weeks.

Previous miscarriages

This shows the general research average for people with a similar history.

Please enter a valid age (15–55) and week (4–20).

Your general estimate

Each figure below is a separate published average — read together, not added up.

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Based on your pregnancy week

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Based on your age group

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Based on your pregnancy history

About recurrent pregnancy loss Three or more prior losses is a pattern doctors take seriously and usually investigate further — it's medically known as recurrent pregnancy loss (RPL). Testing can look at hormone levels, uterine shape, clotting factors, and genetic factors for both partners. It's worth asking your doctor about an RPL workup, since it can sometimes identify a treatable cause.

How to read these numbers These are separate population-level averages, not a single combined score for you. Individual risk depends on many factors this tool doesn't see — overall health, hormone levels, and your own scan and bloodwork results.

A gentle note If these numbers bring up worry, that's completely understandable. Please share how you're feeling with your doctor or midwife — they can look at your specific situation and guide you in a way a calculator can't.