Choose Your Assessment Level
Both calculators use peer-reviewed research. PREMIUM provides the most comprehensive analysis.
Core Factors Included:
- Age & gestational age
- Previous pregnancy history
- Heartbeat detection
- BMI & body composition
- Key conditions (diabetes, TPO, APS)
- Basic lifestyle (smoking, caffeine, alcohol)
Results Include:
- Risk percentage
- Risk category
- Basic interpretation
- Email summary
Everything in FREE, plus:
- 40+ additional medical factors
- Fetal heart rate & hCG trends
- Uterine conditions (fibroids, anomalies)
- Complete medication history
- Infections & exposures
- Detailed lifestyle factors (vaping, cannabis, exercise)
- Family medical history
Enhanced Results:
- Visual impact breakdown of each factor
- Interactive risk factor charts
- Detailed medical interpretation
- Comprehensive email report
💡 Most accurate assessment: PREMIUM considers 10x more factors for the most personalized risk estimate.
Why Pregnalyze?
Science-Backed
Based on 5 peer-reviewed studies with over 50,000 participants. We cite every source and explain our methodology transparently.
Private & Secure
Your data is encrypted and never shared. Use the calculator anonymously or create an account to track your pregnancy journey.
Instant Results
Get your personalized risk assessment in under 5 minutes. No waiting, no appointments, completely free for basic calculations.
How It Works
Get your personalized risk assessment in three simple steps
Enter Your Information
Answer a few simple questions about your age, pregnancy week, medical history, and current health metrics.
Get Your Results
Our algorithm analyzes your data using peer-reviewed research to calculate your personalized risk percentage.
Understand & Track
Receive clear explanations, citations, and the option to track your risk as your pregnancy progresses.
Built on Trusted Research
Our algorithm is based on five major peer-reviewed studies published in leading medical journals
Obstetrics & Gynecology (2008)
Tong et al. - First trimester risk baseline study
“Miscarriage Risk for Asymptomatic Women After a Normal First-Trimester Prenatal Visit”
BJOG International Journal (2007)
Maconochie et al. - Multi-factor risk analysis
“Risk factors for first trimester miscarriage - UK population-based case-control study”
Birth Defects Research (2012)
Avalos et al. - Life table analysis with 50,000+ participants
“A systematic review to calculate background miscarriage rates using life table analysis”
American Journal of Epidemiology (2013)
Mukherjee et al. - Demographic variations study
“Risk of Miscarriage Among Black Women and White Women in a US Prospective Cohort Study”
Frequently Asked Questions
Common questions about our calculator and methodology
Is this calculator medically accurate?
Our calculator is based on five peer-reviewed studies published in leading medical journals, with data from over 50,000 participants. However, it provides statistical estimates only and cannot predict individual outcomes. Always consult your healthcare provider for medical advice specific to your situation.
Is my data private and secure?
Yes. All data is encrypted and stored securely. You can use the basic calculator completely anonymously without creating an account. If you choose to create an account to track your pregnancy, your data is protected and never shared with third parties.
What's the difference between free and premium?
The free calculator provides a one-time risk assessment based on basic factors (age, pregnancy week, BMI, medical history). Premium adds continuous tracking, advanced factors (hCG levels, symptoms), personalized PDF reports, and week-by-week risk updates as your pregnancy progresses.
Can this calculator diagnose a miscarriage?
No. This calculator provides statistical risk estimates only and cannot diagnose any medical condition. If you're experiencing symptoms like bleeding, severe cramping, or other concerning signs, contact your healthcare provider immediately. This tool is for informational purposes only.
What pregnancy weeks does this cover?
Our calculator provides risk estimates from 4 weeks to 20 weeks of pregnancy, as this is the clinical definition of miscarriage. The risk naturally decreases as pregnancy progresses, with the most significant drop after detecting a fetal heartbeat around 6-8 weeks.
How is this different from other calculators?
Pregnalyze considers more risk factors than basic calculators, has a modern intuitive interface, offers continuous tracking for premium users, and provides clear explanations with scientific citations. We're transparent about our methodology and limitations.