Expected Delivery Date (EDD)

Due Dates

After I noticed of my pregnancy, the first question I'll ask is "When will I due?"

At my first prenatal visit, my health care provider helps me to determine an expected delivery date (EDD). My EDD will be 40 weeks from the first day of my last menstrual period (LMP). If I deliver on the EDD, my baby is actually only 38 weeks old. This is because the egg didn't become fertilized until about 2 weeks after the start of my LMP.

It's important to remember that the EDD is only an estimate. Most babies are born between 38 and 42 weeks from the first day of their mom’s LMP and only a small percentage of women actually deliver on their EDD.