What is the expected date of delivery for your pregnant client when her last menstrual period was on 10/20/2016?

  • 7/7/2017

  • 8/7/2017

  • 6/7/2017

  • 8/1/2017

Correct Response: A

The expected date of delivery is calculated using Nagle’s rule which is:

The first day of last menstrual period – 3 months + 7 days = the estimated date of delivery

For example, when the first day of the last menstrual period is 10/20/2016 you would:

Subtract three months from 10/20/2016 and then you get 7/20/2016 and then
Add seven days to 7/20/2016 and then get 7/27/2016, after which you would
Add one year to 7/27/2016 to get the estimated date of delivery for7/27 of the following year which is 7/27/2017.