ObstetricsBeginner

Gestational Age & Pregnancy Milestones

Calculates pregnancy trimester, days to delivery, and clinical milestones.

Clinical Parameters

2 Variables
weeks
days

Awaiting Clinical Parameters

Configure the patient variables on the left and select Calculate Result to generate the clinical score and stratification.

Verified 2026 GuidelinesInstant Calculation
Jump to Formula & Clinical Protocol ↓
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High Yield Prometric TopicObstetrics & Gynecology

Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)

Clinical calculations and diagnostic scoring systems like Gestational Age & Pregnancy Milestones frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.

Clinical Significance & Diagnostic Standard
2026 Clinical Reference

What is the Gestational Age & Pregnancy Milestones?

📋Clinical Summary & Definition Capsule

The Gestational Age & Pregnancy Milestones is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in obstetrics & gynecology practice. Given the current gestational age (in weeks and days), this calculator determines the current trimester, estimated days remaining until delivery (40 weeks), and displays the upcoming clinical milestones and screening tests for the pregnancy. Clinical scoring tools like Gestational Age & Pregnancy Milestones are essential in acute and outpatient management, enabling clinicians to objectively differentiate between low-risk candidates suitable for conservative therapy and high-risk patients requiring urgent interventions. Verified against current 2026 clinical standards, this tool is extensively tested on Gulf health authority licensing exams including DHA (Dubai), SMLE (Saudi Arabia), MOH, HAAD/DOH (Abu Dhabi), OMSB (Oman), and QCHP (Qatar).

💡Clinical Pearls & Diagnostic Utility

Accurate gestational age dating is critical for guiding prenatal diagnostic testing, assessing fetal growth, timing vaccinations, and determining the appropriate timing for delivery.

Mathematical Formulation

Formula & Calculation Parameters

The mathematical equation and clinical variables required to calculate Gestational Age & Pregnancy Milestones:

Total Days = (Weeks × 7) + Days. 40 Weeks = 280 Days (standard human gestation).
Risk Stratification

Score Interpretation & Clinical Stratification

Score RangeClinical InterpretationRisk Tier
≤ 13.6First Trimesterblue
14 – 27.6Second Trimestergreen
28 – 36.6Third Trimester (Pre-term)yellow
≥ 37Term Pregnancyrose
Clinical Limitations & Contraindications

When to Exercise Caution

If ultrasound dating differs significantly from LMP dating (e.g. > 7 days in the 1st trimester), the ultrasound date should be used as the definitive EDD.

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Medical Review & Guidelines Compliance
MD

Clinical Review Board

Dr. Muhammad Nouman, MBBS

Capital Medical University | PMDC Reg No: 117744-P

Clinical Audit Status

✓ Verified for 2026 Guidelines

Last updated: 2026-08-07

Peer-Reviewed Medical Literature

  • ACOG Committee Opinion No. 700: Methods for Estimating the Due Date. Obstet Gynecol. 2017;129(5):e150-e154.
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