Pregnant and dating
While there might not be a problem with the baby, anyone who has gone two weeks past their due date will tell you – by that time you just want the baby O. The first two weeks of pregnancy are spent gearing up to ovulate.So technically you kind of do have a period while pregnant.Every day of that pregnancy your baby, and your body is growing and changing.
Remember, its just a range and it does not mean there is a problem if you haven’t delivered by your EDD. Pregnancies are split up into weeks, months and trimesters. By the earliest time you could pee on that stick and get your positive, your baby (or babies! Once you stop bleeding, your body starts the cycle again.
That means 95% of women deliver on a date different than their EDD/EDC. So if a pregnancy is 9 months, a trimester is 3 months long.
Most obstetricians give a 2-week window around the EDD ( /- 1 week on either side of the date), to better capture the dates moms give birth. The first and second trimester each have 13 weeks, while the third trimester has 14 weeks. (Wait, don’t fall asleep yet – I promise this is helpful – and short!
(My pregnancy calculator is below.) If you have irregular cycles, a newer formula, named the Mittendorf Williams Rule (1990s), will probably be more accurate in calculating your EDD.
Note: Very few women deliver on their EDDs – less than 5%.