How accurate is the miscarriage risk calculator?

This calculator provides evidence-based estimates from published research. However, individual risk varies. Always consult your healthcare provider for personalized assessment.

What factors affect miscarriage risk?

Key factors include gestational age, maternal age, previous pregnancy history, chromosomal abnormalities, health conditions like diabetes or thyroid disorders, and lifestyle factors.

Does risk decrease after seeing a heartbeat?

Yes, once a heartbeat is confirmed (usually around 6-7 weeks), miscarriage risk drops significantly to about 5% and continues decreasing each week.

Is high maternal age a major risk factor?

Yes, risk increases with maternal age: ~15% at 20-30, ~20% at 35, ~40% at 40, and higher at 45+, primarily due to increased chromosomal abnormalities.

Can lifestyle changes reduce risk?

While most miscarriages cannot be prevented, avoiding smoking and alcohol, maintaining healthy weight, managing chronic conditions, and taking prenatal vitamins may help.

When should I contact my doctor?

Contact your doctor immediately if you experience heavy bleeding, severe cramping, fever, or passing tissue. Some spotting in early pregnancy can be normal but should be reported.

Important Medical Disclaimer

This calculator provides educational estimates only based on general population statistics. It is NOT a substitute for professional medical advice, diagnosis, or treatment.

Every pregnancy is unique. Your actual risk depends on many factors that cannot be captured by any calculator. Always consult your healthcare provider for personalized assessment and care.

If you experience bleeding, severe cramping, or any concerning symptoms, contact your healthcare provider immediately.

Miscarriage Risk Calculator

Estimate pregnancy loss risk based on clinical research factors. For educational purposes only.

1Enter Your Information

Your Age

Weeks Pregnant

Risk decreases significantly after week 12

Previous Miscarriages

BMI (Body Mass Index)

Calculate your BMI →

Daily Caffeine Intake

Baseline Risk by Week

Risk decreases significantly as pregnancy progresses past the first trimester.

Week 4

25%

Week 5

20%

Week 6

15%

Week 7

10%

Week 8

Week 9

3.5%

Week 10

2.5%

Week 11

Week 12

1.5%

Week 13

Medical Disclaimer

This calculator provides general estimates only and is not medical advice. Always consult your healthcare provider for personalized guidance.

Understanding Miscarriage Risk

What is a miscarriage?

Miscarriage (spontaneous abortion) is the loss of a pregnancy before 20 weeks gestation. Most occur in the first 12 weeks. About 10-20% of known pregnancies end in miscarriage, though the actual number is likely higher as many occur before a pregnancy is even detected.

Common causes

Most miscarriages are caused by chromosomal abnormalities in the embryo (50-60%). Other factors include uterine abnormalities, hormonal issues, infections, and lifestyle factors. Many miscarriages occur despite doing everything "right" and are not preventable.

About Miscarriage Risk Calculator - Pregnancy Loss Assessment

Calculate miscarriage risk based on gestational age and maternal factors. Get personalized risk assessment.

Our **Miscarriage Risk Calculator** provides evidence-based risk estimates for pregnancy loss based on gestational age, maternal age, and other health factors. Understanding your risk can help you have informed discussions with your healthcare provider. Track your pregnancy with our Due Date Calculator.

Miscarriage risk varies significantly by gestational age—declining rapidly after a heartbeat is detected and even more after the first trimester. This calculator incorporates published medical research on spontaneous pregnancy loss rates. For hormone monitoring, try our HCG Calculator.

**Medical Disclaimer:** This calculator provides general information based on published research. Your individual risk may differ based on factors not captured here. Always consult with your healthcare provider for personalized medical advice. Use our BMI Calculator to assess weight-related factors.

Key Features

Gestational age-based risk

Maternal age adjustment

Health factor consideration

Risk factor breakdown

Evidence-based estimates

Supportive recommendations

Why Use This Tool?

Understand risk factors

Track decreasing risk by week

Have informed provider discussions

Reduce anxiety with knowledge

Plan appropriate monitoring

Common Use Cases

Early Pregnancy Monitoring: Understand how risk changes week by week.

Patient Education: Healthcare providers can use this to explain risk factors.

Anxiety Management: Knowledge of decreasing risk can provide reassurance.

Health Planning: Identify modifiable risk factors to discuss with your doctor.

Technical Information

Risk estimates based on large-scale medical studies and meta-analyses
Adjusts for maternal age using established risk curves
Incorporates heartbeat detection as a positive prognostic factor
Considers common risk modifiers (previous loss, smoking, etc.)

Helpful Resources

ACOG Pregnancy Loss

American College of OB/GYN information on early pregnancy loss.

How to Use

Enter current gestational week

Select your age range

Indicate health conditions

Note if heartbeat confirmed

View risk assessment