If you’ve been planning your pregnancy, you may have been tracking your ovulation, and you may be able to use this as the date of conception. You can check our ovulation calculator here to help you work out when you’re going to be most fertile. Once an egg has been released from your ovaries, it has a 12 to 24 hour window in which it can be fertilised. To get a more accurate idea of your baby’s due date by conception, you’ll need to know exactly when you ovulated, as well as the exact date you had sex. This means that conception can take place several days after you’ve had unprotected sex. That’s because sperm can live inside the body for up to five days and your egg can live for 24 hours after being released from the ovary. Whilst you might know the exact day that you had sex, knowing the exact date of conception is harder to pinpoint. But if that hasn’t yet been arranged, there are several ways you can roughly calculate your estimated due date (EDD) yourself. After all, there’s a lot to think about, particularly if you like to be prepared.Īt your first appointment following a positive pregnancy test, your midwife or GP will give you an estimated due date.

As soon as you discover that you’re pregnant, you’ll probably be eager to know when your baby is likely to arrive.

Due date calculator conception date