How is your due date is calculated?
Your due date is estimated by adding 40 weeks (280 days) to the approximate date of conception. The date of conception is considered to be about 2 weeks after the first day of your last menstrual cycle. Only 5% of women deliver their babies on their projected due date, so this date should be used as an estimate. It is not an exact calculation. **On phone or tablet scroll to see calculator!