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Naegeles Rule The
EDC (estimated date of confinement) or EDB (estimated date of birth) is
usually calculated from the menstrual history. How to calculate: 1.
The calculation begins with the First day of the last menstrual period 2.
From this date, go back 3 months 3.
Add 7 days to the last date Example: 1. First
day of last menstrual period = March 12. 2.
Go back 3 months from March 12 = December 12. 3.
Add 7 days to December 12 =
December 19 is the due date Try another: 1. First
day of last menstrual period = August 27 2.
Go back 3 months from August 27
= May 27 3.
Add 7 days to May 27 = June
3 (May had 31 days) |