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How to Calculate My Pregnancy Due Date

December 10, 2017 by ds_9723 Leave a Comment

Learning when your baby is due is one of the most exciting moments of pregnancy. While a pregnancy due date calculator or ultrasound exam can be used to determine your estimated due date, if neither of those are readily available, you can use Nagele’s rule to calculate when your baby is due. Using the rule developed in the 1850s by Dr. Nagele, you can accurately calculate pregnancy due date.

How to Calculate Pregnancy Due Date

Step 1

Remember when you had your last period. Make note of the first day of your last menstrual period, or LMP. If your last menstrual period started on January 7, that is the date of your last menstrual period.

Step 2

Add seven days to the first day of your last menstrual period, LMP + 7. Adding seven days to the first day of a last menstrual period of January 7 brings you to January 14.

Step 3

Subtract three months (LMP + 7 days — 3 months). Subtracting three months from January 14 gives you an estimated due date of October 14.

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Filed Under: Pregnancy

About ds_9723

Michelle LaRowe is the 2004 International Nanny Association Nanny of the Year and the author of the "Nanny to the Rescue!", "Working Mom's 411" and a "Mom's Ultimate Book of Lists." Michelle graduated from Bridgewater State College with a Bachelor of Science Degree in Chemistry and holds a Certificate in Pastoral Studies from Global University. To learn more about Michelle visit www.michellelarowe.com.

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