How Our Calculator Works
Get your personalized miscarriage risk assessment in 3 simple steps.
Enter your information
Answer questions about your pregnancy week, maternal age, medical history, and lifestyle factors. Takes just 2 minutes.
Receive risk assessment
Our algorithm calculates your miscarriage risk using data from 50+ peer-reviewed studies. Instant, personalized results.
Understand your results
See which risk factors influenced your results with clear explanations and evidence-based context for your pregnancy.
Your free results include all core factors. If you'd like a deeper look, you can optionally unlock a premium calculator with partner fertility inputs, hCG trends, advanced medical / immune / hormonal factors, conception method (Natural / IVF / IVF with PGT), and more.
Free Miscarriage Risk Calculator
Evidence-based assessment from peer-reviewed research
Designed for singleton pregnancies up to 19 weeks 6 days (not validated for twins or multiples).
Step 1 of 4
Ultrasound findings provide important information about pregnancy viability
Disclaimer: This tool provides statistical estimates only and cannot predict individual outcomes. It is not medical advice. Always consult your healthcare provider about your personal situation.
Trusted Miscarriage Risk Calculator
Peer-Reviewed Research
Our miscarriage risk calculator uses data from 50+ peer-reviewed studies analyzing over 500,000 pregnancies. Every risk factor is backed by published medical research.
100% Private & Secure
Your health data stays confidential. All pregnancy information is encrypted and never shared with third parties. Use our calculator completely anonymously.
Results in 2 Minutes
Get your personalized miscarriage risk assessment instantly. Simple questionnaire, immediate results, and clear statistical breakdown you can understand and discuss with your doctor.
Our premium calculator analyzes 40+ research-backed factors for a more precise estimate.
Evidence-Based Research
Our miscarriage risk algorithm is built on 50+ peer-reviewed studies published in leading medical journals including BMJ, The Lancet, Obstetrics & Gynecology, Human Reproduction, and NEJM.
Obstetrics & gynecology (2008)
Tong et al. - First-trimester baseline risk study
“Miscarriage risk for asymptomatic women after a normal first-trimester prenatal visit”
BMJ (2019)
Magnus et al. - Over 500,000 pregnancies studied
“Role of maternal age and pregnancy history in risk of miscarriage: prospective register-based study”
Human Reproduction Update (2020)
Nadia A. du Fossé et al. - Paternal age meta-analysis
“Advanced paternal age is associated with an increased risk of spontaneous miscarriage: a systematic review and meta-analysis”
American Journal of Obstetrics & Gynecology (2021)
Sundermann et al. - Lifestyle and early pregnancy
“Week-by-week alcohol consumption in early pregnancy and spontaneous abortion risk: a prospective cohort study”
Why We Built This Calculator
Created by people who understand the desperate search for answers
We are a small, data-driven team deeply focused on miscarriage and early-pregnancy research. We analyze published medical studies, clinical guidelines, and population-level data — not just because we care about evidence, but because we've lived through pregnancy loss ourselves.
After five consecutive pregnancy losses, endless appointments, and countless hours digging into medical journals, we realized something critical: there was no clear, evidence-based miscarriage risk calculator that provided personalized estimates based on individual factors.
Everything felt vague, generalized, or outdated. We couldn't find answers to questions like “What's my miscarriage risk at 8 weeks given my age and history?” or “How do my specific medical conditions affect my pregnancy outcome?”
So we built Pregnalyze — the most comprehensive miscarriage risk calculator available, grounded entirely in peer-reviewed medical research and created by people who know exactly what it feels like to search desperately for data, patterns, and clarity during pregnancy.
Evidence-Based Methodology
Every risk factor in our calculator comes from peer-reviewed studies, real statistics, and validated research — not intuition, opinions, or guesswork.
Transparent Limitations
Our calculator provides statistical estimates only and does not diagnose or replace medical advice. We're honest about what it can and cannot do.
Personal Experience
Built by people who experienced pregnancy loss firsthand, with deep empathy and unwavering commitment to helping others find the answers we wished we had.
Our mission: Provide the most accurate, evidence-based miscarriage risk assessment available — bringing clarity, transparency, and peace of mind to expecting mothers everywhere.
Looking for a More Detailed Analysis?
Your free assessment includes the essential factors that influence early pregnancy risk. If you'd like a deeper breakdown including partner factors, expanded medical history, medication exposure, hCG trends, infections, and 40+ research-based inputs — you can upgrade anytime.