There are around 266 days between fertilisation and the birth of your baby. The first day of your last period is used to calculate your due date because the time that sexual intercourse took place does not have to coincide with fertilisation.
Important to know: A normal, 'on-schedule' full-term birth can deviate up to 2 weeks from the calculated due date. And deviations are the norm here: Only 5% of all pregnant women give birth on the calculated due date.
Calculate your child's due date:
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Our Hirslanden hospitals throughout Switzerland are delighted to have the privilege of being at your side when you give the gift of life to a small human being.