Thursday, September 10, 2020

Naegele's formula

  

Naegele's formula

The Naegele's formula is a simple arithmetic method for calculating the EDD (estimated date of delivery) based on the LMP (last menstrual period). 

To the date of the first day of the LMP (e.g. 22nd June 2019):

  • add seven days (i.e 29th)
  • subtract 3 months (i.e March)
  • add one year (i.e 2020)
Note: If the interval of cycles is longer, the extra days are to be added and if the interval is shorter, the lesser days are to be subtracted to get the EDD.

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