What is the expected date of delivery (EDD) if the LMP is Jan 30? - ProProfs Discuss

# What is the expected date of delivery (EDD) if the LMP is Jan 30?

A. Oct. 7
B. Oct. 24
C. Nov. 7
D. Nov. 8

This question is part of Maternity Nursing Test I- www.RNpedia.com
Asked by RN pedia, Last updated: Aug 07, 2020

#### mbmtournesol

The correct answer would be October 7.

If you subtract 3 months from January wouldn't that be October?
January; December (1 month), November (2nd month), October(3rd month)...
Or is it because it is later on in January so the whole month counts?
Do we need to take into consideration that January can have 31 days, so adding 7 days could make the day on the 6th?
And even if you add 9 months (normal gestation period) after the Jan. 30 you get the month October:
Jan-Feb (1), Feb-Mar (2), Mar-Apr (3), Apr-May (4), May-Jun (5), Jun-Jul (6), Jul-Aug (7), Aug-Sept (8), Sept-Oct (9).

#### miranda_me

If you subtract 3 months from January wouldnt that be October?
January; December (1 month), November (2nd month), October(3rd month)...
Or is it because it is later on in January so the whole month counts?
Do we need to take into consideration that January can have 31 days, so adding 7 days could make the day on the 6th?
And even if you add 9 months (normal gestation period) after the Jan. 30 you get the month October:
Jan-Feb (1), Feb-Mar (2), Mar-Apr (3), Apr-May (4), May-Jun (5), Jun-Jul (6), Jul-Aug (7), Aug-Sept (8), Sept-Oct (9).

#### John Smith

John Smith

Nov. 7

Based on the last menstrual period, the expected date of delivery is Nov. 7. The formula for the Naegeles Rule is subtract 3 from the month and add 7 to the day.