Memory Joggers: Obstetrics - Estimated Delivery Date (NAEGELE'S RULE)
First day of last normal menstrual period:
(example) August 12, 1993
- Add 7 days.
(12th becomes 19th)
- Subtract 3 months.
(Aug becomes May)
- Add 1 year.
(1993 becomes 1994)
Estimated Delivery Date:
May 19,1994
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