Are you expecting? Use this pregnancy due date calculator to find out when your baby is due. Your health care provider will confirm the baby's gestational age with a first trimester ultrasound.
Conception Date: If you have been using an ovulation predictor kit or tracking your ovulation you may be able calculate your due date based on the precise date of conception. In order to do this simply count 266 days, or 38 weeks, from the conception date to find your estimated due date.
Last Period: This is the most common way to calculate your estimated due date. To calculate, count 40 weeks, or 280 days, from the first day of your last menstrual period.
IVF: If you conceived through IVF, you can calculate your estimated due date using your IVF transfer date. If you had a day-three transfer, count 263 days from the transfer to your estimated due date, and for a day-five transfer, count 261 days.