How
is your due date calculated?
Your due date is estimated by
adding 40 weeks (280 days) to the approximate date of conception.
The date of conception is considered to be about 2 weeks
after the first day of your last menstrual cycle. Only 5%
of women deliver their babies on their projected due date,
so this date should be used as an estimate; it is
not an exact calculation.
Enter the first day of your last
menstrual period below:
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