Moms' Stories
How do I work out my due date?

How do I work out my due date?


Your pregnancy due date is calculated from the 1st day of your last period, not from the date that you had unprotected sex.

Take the rough day your last period started. Add 1 year, subtract 3 months and add 7 days.

 The average length of a pregnancy is 40 weeks, or 280 days, from the first day of the last normal period. Few give birth on their exact due date. Most babies are born within ten days of the due date. That's a fairly large window, beginning ten days before the due date and extending out ten days after the due date. A pregnancy that occurs during this time period--that is, between 38 and 42 weeks--is called full term.

Knowing your due date will help you plan ahead, and it will give you the answer to the one question that everyone will ask you during your pregnancy: What's your due date?

Your clinic will tell you your due date. Remember to keep your visits throughout your pregnancy so they can check your baby is growing well. 

Do you have a question for Doc Nicola?  Remember you need to join MAMA to ask your question by clicking on the 'register for MAMA' button on the home page. ‚Äč You will also get weekly info on your pregnancy or baby.


More Moms' Stories
Share This Site