This calculator is based on a regular 28 day menstrual cycle. Average
pregnancies are 280 days from your last menstrual cycle. A baby is considered on
time if it is born either two weeks before or two weeks after the estimated due
date.
Doctors call your due date the estimated date of confinement, or EDC. This
is calculated by forty weeks and starts on the first day of your last period.
To determine your due date, you can use Neagele's Rule.
Take the first day of your last period.
Subtract three months.
Add seven days.
Your result is your approximated due date. Remember, a pregnancy is 40
weeks. You often hear nine months, which actually calculates to 36 weeks.
To view a picture of your baby's current stage of development, fill in your information below:
For a more detailed look at what will be happening at your current stage of
pregnancy, visit our Pregnancy Week by Week!