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CLINICAL TOOL · ACOG CO 700 · MULTI-MODE DATING · LMP + IVF + ULTRASOUND · INDIA-CALIBRATED

Pregnancy
Due Date Calculator.

Guideline-aligned EDD from LMP, IVF/embryo transfer, or ultrasound scan. Gestational week, trimester stage, birth probability window, and trimester-specific Indian nutrition — all in one place.

ACOG CO 700 (2017) — LMP, IVF, USG Modes
Cycle-Corrected Naegele + 283-Day Model
Birth Probability Window · Jukic 2013
Trimester Nutrition · ICMR-NIN 2020

Calculate Your Due Date

ACOG CO 700 · Multi-mode · Cycle correction · Birth probability window

Dating Method * ACOG CO 700 recommends ultrasound as the preferred dating method when available. LMP with cycle correction is standard when no scan has been done. IVF/ART provides the most precise dating (known conception timing).
Naegele rule: EDD = LMP + 280 + (cycle length - 28) days. Cycle correction per ACOG CO 700 and Indian prospective studies (Kumar 2017).
Default 28. Enter your actual cycle length for accuracy.

Jukic et al. BJOG 2013 (125 natural conceptions): mean gestation from LMP = 283.2 days. Adds 3 days to standard EDD. Not universally adopted clinically.

Personalisation (Optional) Parity and BMI slightly shift the birth probability distribution. Jukic 2013: primiparas tend to deliver ~1.7 days later; multiparas ~1.1 days earlier. BMI has minimal effect on dating but affects GDM and complication risk flagging.
For GDM risk and nutrition flags

ACOG CO 700 (2017) · Naegele + Cycle Correction · Jukic 2013 · ICMR-NIN 2020 · ACOG PB 175

EXPECTED DUE DATE
Enter details →

PREGNANCY NUTRITION

Trimester-Specific Dietitian Support

Personalised meal plans, GDM prevention, iron and folate optimisation from our pregnancy specialist dietitians.

Book Consultation →

WHAT THIS CALCULATOR GIVES YOU

📅
Multi-Mode EDDLMP + cycle correction, IVF/ART, ultrasound redating
🎯
ACOG-Aligned RedatingUSG vs LMP comparison with clinical thresholds
📊
Birth Probability WindowStatistical distribution from Jukic 2013 cohort data
🥗
ICMR-NIN 2020 NutritionTrimester-specific Indian meal guidance
🌱
Week-by-Week GuideMilestones, screenings, and development markers

CLINICAL REFERENCES

ACOG CO 700 (2017)Methods for Estimating the Due Date. Obstet Gynecol 129(5):e150-e154
ACOG PB 175 (2016)Ultrasound in Pregnancy — redating thresholds
Jukic AM et al. (2013)Length of human pregnancy. BJOG 120(12):1555-1561
ICMR-NIN (2020)Nutrient Requirements for Indians — Pregnant Women
WHO ANC Guidelines (2016)WHO Recommendations on Antenatal Care

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This calculator is an educational and clinical-support tool aligned with ACOG Committee Opinion 700 (2017), ACOG Practice Bulletin 175 (2016), and ICMR-NIN 2020. Due date estimates are statistical starting points. Ultrasound by a qualified sonographer remains the gold standard for gestational age assessment. Birth probability distributions are statistical models (Jukic 2013 cohort data) and are not for medical decision-making. Always confirm dates and manage your pregnancy with your obstetrician, gynaecologist, or midwife. Seek immediate care for any pregnancy emergency.