ISBN: | 978-5-5122-1275-2 |
High Quality Content by WIKIPEDIA articles! Naegele`s Rule is a standard way of calculating the due date for a pregnancy. The rule estimates the expected date of delivery (EDD) by adding one year, subtracting three months, and adding seven days to the first day of a woman`s last menstrual period (LMP). The result is approximately 280 days (40 weeks) from the LMP.