How accurate is the due date?

Only about 5% of babies are born on the exact EDD (Expected Date of Delivery) given to them. This date is an estimate based on an average 40 week pregnancy. The most accurate way to determine the date is the ultrasound scan done at 12 weeks.

How to calculate the due date of the baby?

According to Naegele's rule: Counting back 3 months from the date of the last menstrual period (LMP), adding 7 days and a year. Or: LMP + 280 days.

ꯃꯃꯥꯒꯤ ꯍꯀꯁꯦꯜ꯫

ꯑꯉꯥꯡ ꯄꯣꯀꯄꯒꯤ ꯇꯥꯡ (ꯏ.ꯗꯤ.ꯗꯤ.)

ꯑꯔꯣꯏꯕꯥ ꯊꯥꯒꯤ ꯈꯣꯡꯀꯥꯞ ꯑꯗꯨꯗꯥ ꯌꯨꯝꯐꯝ ꯑꯣꯏꯗꯨꯅꯥ ꯄꯤꯒꯗꯕꯥ ꯇꯥꯡ ꯑꯗꯨ ꯂꯦꯄꯊꯣꯀꯎ꯫

Medically Reviewed:

Dr. Priya Sammani, MBBS, PG Dip. FM

Updated on: April 2026

❓ Frequently Asked Questions (FAQ)

ꯄꯤꯒꯗꯕꯥ ꯇꯥꯡ ꯑꯗꯨ ꯀꯌꯥ ꯌꯥꯝꯅꯥ ꯑꯆꯨꯝꯕꯥ ꯑꯣꯏꯕꯒꯦ?

ꯑꯉꯥꯡꯁꯤꯡꯒꯤ ꯆꯥꯎꯔꯥꯛꯅꯥ 5% ꯈꯛꯇꯃꯛ ꯃꯈꯣꯌꯗꯥ ꯄꯤꯔꯤꯕꯥ ꯑꯀꯛꯅꯕꯥ EDD (Expected Date of Delivery) ꯑꯗꯨꯗꯥ ꯄꯣꯀꯏ꯫ ꯃꯁꯤꯒꯤ ꯇꯥꯡ ꯑꯁꯤ ꯆꯥꯡꯆꯠꯇꯥ ꯅꯨꯃꯤꯠ 40ꯅꯤꯒꯤ ꯃꯤꯔꯣꯅꯕꯥ ꯑꯃꯗꯥ ꯌꯨꯝꯐꯝ ꯑꯣꯏꯕꯥ ꯑꯦꯁ꯭ꯇꯤꯃꯦꯠ ꯑꯃꯅꯤ꯫ ꯇꯥꯡ ꯑꯗꯨ ꯈꯪꯗꯣꯛꯅꯕꯒꯤ ꯈ꯭ꯕꯥꯏꯗꯒꯤ ꯑꯆꯨꯝꯕꯥ ꯄꯥꯝꯕꯩꯗꯤ ꯅꯨꯃꯤꯠ 12ꯅꯤꯒꯤ ꯃꯅꯨꯡꯗꯥ ꯄꯥꯡꯊꯣꯀꯄꯥ ꯑꯂꯠꯔꯥꯁꯥꯎꯟꯗ ꯁ꯭ꯀꯦꯅꯅꯤ꯫

ꯑꯉꯥꯡ ꯑꯗꯨꯒꯤ ꯄꯣꯀꯄꯒꯤ ꯇꯥꯡ ꯑꯗꯨ ꯀꯔꯝꯅꯥ ꯂꯦꯄꯀꯅꯤ?

ꯅꯦꯒꯦꯂꯒꯤ ꯅꯤꯌꯃꯒꯤ ꯃꯇꯨꯡꯏꯟꯅꯥ: ꯑꯔꯣꯏꯕꯥ ꯊꯥꯒꯤ ꯈꯣꯡꯀꯥꯞ (LMP)ꯒꯤ ꯇꯥꯡꯗꯒꯤ ꯊꯥ 3ꯒꯤ ꯃꯇꯨꯡꯗꯥ, ꯅꯨꯃꯤꯠ 7 ꯑꯃꯁꯨꯡ ꯆꯍꯤ ꯑꯃꯥ ꯍꯥꯄꯆꯤꯅꯕꯥ꯫ ꯅꯠꯔꯒꯥ: ꯑꯦꯜ.ꯑꯦꯝ.ꯄꯤ.+ ꯅꯨꯃꯤꯠ ꯲꯸꯰ꯅꯤ꯫

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ꯋꯥꯔꯜꯗ ꯍꯦꯜꯊ ꯑꯣꯔꯒꯅꯥꯏꯖꯦꯁꯟ (ꯗꯕꯜꯌꯨ.ꯑꯩꯆ.ꯑꯣ.) ꯑꯃꯁꯨꯡ ꯃꯥꯂꯦꯃꯒꯤ ꯑꯣꯏꯅꯥ ꯁꯀꯈꯉꯂꯕꯥ ꯀ꯭ꯂꯤꯅꯤꯀꯦꯜ ꯃꯦꯗꯤꯀꯦꯜ ꯒꯥꯏꯗꯂꯥꯏꯅꯁꯤꯡ ꯑꯃꯁꯨꯡ ꯁ꯭ꯇꯦꯟꯗꯔꯗ ꯏꯛꯌꯨꯏꯄꯃꯦꯟꯇꯁꯤꯡ꯫

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Medical Disclaimer: These calculators are provided for educational purposes only and are not a substitute for professional medical advice. Always consult a qualified physician regarding any health concerns..