Preeclampsia Risk Calculator

Assess maternal factors with a structured screening calculator. View risk flags, notes, and graphs instantly. Save clear summaries for prenatal visits and follow-up discussions.

Calculator Form

Large screens use 3 columns, medium screens use 2, and mobile uses 1.

Pregnancy Details
Current Measurements
Urine Screening
Optional. A value of 0.30 or more is treated as positive.
High-Risk Factors
Moderate-Risk Factors
Warning Symptoms
This tool is designed for educational screening support and exportable visit summaries.

Formula Used

This section explains the transparent scoring logic used on this page.

Guideline Trigger

Increased risk history profile is triggered when:

(High-Risk Factors ≥ 1) OR (Moderate-Risk Factors ≥ 2)

This mirrors a transparent history-based screening rule commonly used when deciding whether closer review or preventive discussion is reasonable.

Weighted Educational Score

Score = (High × 4) + (Moderate × 2) + BP Points + Protein Points + Symptom Points + Severe BP Bonus

The weighted score improves sorting and graphing. It is not a validated probability and must never replace clinical judgment.

Blood Pressure Logic

BP Elevated = SBP ≥ 140 OR DBP ≥ 90 after 20 weeks

Severe BP = SBP ≥ 160 OR DBP ≥ 110

Entered pressure does not diagnose disease by itself, but it changes the urgency message.

Mean Arterial Pressure

MAP = (SBP + 2 × DBP) ÷ 3

MAP is displayed as an extra monitoring metric. It is informative, but not the main trigger used here.

How to Use This Calculator

A simple workflow for prenatal screening conversations.

  1. Enter gestational age, age, BMI, and current blood pressure.
  2. Check any known major or moderate pregnancy risk factors.
  3. Add optional urine information if available from testing.
  4. Select any current warning symptoms present today.
  5. Press Calculate Risk to show the result above the form.
  6. Review the profile badge, current warning badge, recommendations, and Plotly chart.
  7. Use the CSV or PDF buttons to save a summary for a prenatal visit.
  8. Seek urgent care immediately if symptoms or severe blood pressure are present.

Example Data Table

Illustrative examples only. These are not real patient recommendations.

Scenario Weeks Age BMI Key Factors Blood Pressure Typical Output
Low-history profile 18 29 24.1 No major factors 118 / 74 Lower history-based risk profile
Moderate-factor cluster 14 37 33.0 Nulliparity, BMI above 30 124 / 78 Increased risk history profile
Major risk history 16 32 29.0 Previous preeclampsia 126 / 80 Increased risk history profile
Urgent review example 28 35 31.5 Chronic hypertension, headache 162 / 108 Urgent same-day clinical assessment

Frequently Asked Questions

Eight plain HTML FAQs with concise answers.

1. What does this calculator estimate?

It summarizes major history factors, moderate factors, symptoms, blood pressure, and optional urine data to flag whether your pregnancy profile deserves closer clinical discussion.

2. Does this tool diagnose preeclampsia?

No. Diagnosis requires clinical assessment, repeat blood pressure checks, laboratory review, and sometimes fetal monitoring. This page is an educational screening and visit-summary tool.

3. Why are symptoms treated seriously here?

Severe headache, vision changes, upper abdominal pain, vomiting, and sudden swelling are warning symptoms in pregnancy. The calculator therefore raises the urgency message when you select them.

4. Why is one major factor enough to raise concern?

Pregnancy guidelines often recommend extra attention when a patient has a major risk factor, or when multiple moderate factors cluster together. This page makes that rule visible.

5. Why does the page show a weighted score too?

The weighted score helps rank overall screening burden and powers the chart. It improves readability, but it is not a validated probability of disease.

6. When should I seek urgent care?

Urgent review is appropriate for severe pregnancy symptoms, very high blood pressure, or concerning blood pressure plus protein findings. Follow your clinician’s advice and emergency plan.

7. Can I use this before my next prenatal visit?

Yes. It can help organize information, but it should support—not delay—direct prenatal care. Bring the exported summary to your appointment if useful.

8. Why are CSV and PDF downloads included?

They let you save the input values, factor lists, and recommendation summary for discussion, documentation, audit trails, or comparison across visits.

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Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.