Calculating Due Date

by Rachel Simmons August 31, 2023 Updated: September 06, 2023

How to calculate a pregnant patient's due date:  Add 9 months PLUS 1 week from the first day of their last menstrual period.  Example: Last menstrual period started on 6/1/20. Add 9 months PLUS 1 week. Expected due date = 3/8/21

How to calculate a pregnant patient's due date:

Add 9 months PLUS 1 week from the first day of their last menstrual period.

Example: Last menstrual period started on 6/1/20. Add 9 months PLUS 1 week. Expected due date = 3/8/21


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