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More accurate due date calculation

A study done by Mittendorf in 1990 resulted in this (first trimester) prediction of your due date. This Mittendorf-Williams Rule takes more factors into account, like race, coffee consumption and education. Some studies have found the Mittendorf-Williams Rule to be more accurate than Naegele's Rule in calculating due date.

Last menstrual period
Maternal age
Pre-pregnancy length
Pre-pregnancy weigth
Alcohol while pregnant
Cups coffee/day
First pregnancy?
DES exposure in utero
History of incompetent cervix?
History of miscarriage?
History of stillbirth?
1st trimester bleeding?

Normal Due date

Calculate your due date, the way your doctor calculates it. (Using Naegele's Rule)

This is the...
Last period Ovulation

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