The average pregnancy last for 266 days measured from conception. As it can be very difficult to determine when conception occurred, the delivery date is usually calculated from the first day of your last menstrual period. This means that your estimated delivery date will be 280 days from your last menstrual period.
To calculate your estimated delivery date from the chart below, you will need to find the date of your last menstrual period in the left-hand columns, the date in the adjacent right-hand columns is your estimated delivery date. Remember this is just an estimation, and it makes it extremely difficult to predict if you do not have a regular 28 day cycle. Very few babies are born on the date calculated. Doctors consider anything from 38 to 42 weeks of pregnancy to be normal.
Here is a pregnancy calendar for you to calculate your due date. If you are having difficulty viewing this you can download the Excel Spreadsheet. Download Pregnancy Calendar
Follow the pregnancy stages click here: Stages of pregnancy
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