Recurrent miscarriage risk calculator

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Recurrent miscarriage risk calculator

A worksheet to help you understand where you sit relative to common thresholds for recurrent pregnancy loss evaluation, and to prepare questions for your clinician — including what the evidence suggests about miscarriage risk after 2 miscarriages or more.

Your history

Most guidelines define “recurrent” as three or more losses, though many clinics will discuss testing after two.
Loss occurring only after at least one live birth (secondary loss) is discussed slightly differently than loss with no prior live birth (primary loss).
Used only to add context — it does not change your underlying recurrence risk category.

Known medical factors

Factors usually prompting a full work-up on their own
Other relevant factors
Educational tool, not a diagnosis. This calculator reflects general patterns described in the recurrent pregnancy loss literature and common thresholds used by professional bodies such as ASRM, RCOG, and ESHRE. It cannot account for your full history, and it is not a substitute for a consultation with an obstetrician, reproductive endocrinologist, or recurrent pregnancy loss specialist.

Common questions

What counts as recurrent miscarriage?

Definitions vary: ASRM defines recurrent pregnancy loss as two or more failed clinical pregnancies, while some other bodies use a threshold of three consecutive losses before recommending a full work-up. Because of this gap, it’s reasonable to ask your own clinic which threshold they use.

What is the miscarriage risk after 2 miscarriages?

Published estimates vary by study population, but risk of a further miscarriage after two prior losses is commonly cited in the range of roughly one in four to one in three pregnancies, higher than the general background risk and rising further with maternal age or an identified medical cause. Your personal risk depends on your age, the cause (if any) of prior losses, and other health factors, so this figure is a starting point for discussion rather than a personal prediction.

When should I see a specialist after a miscarriage?

Many clinicians are open to an initial conversation after a single loss, especially if you are over 35, have a known risk factor, or simply want reassurance. A referral for structured testing becomes more strongly recommended at two to three losses, and is generally advised without delay once a known contributing condition, such as antiphospholipid syndrome or a uterine abnormality, is identified.