Due date calculator

Pregnancy due date calculatorHow does the due date calculator work?
A German doctor called Naegele came up with a formula to predict when a woman's child would be born. Although Naegele lived in the nineteenth century.

Does it always work?
Every woman, and every pregnancy, is different. Naegele's rule is based on a "normal" 28-day menstrual cycle. If your cycle is longer or shorter than this, you should seek the advice of your doctor or caregiver for their predicted due date.

Due date calculator
What was the first day of your last menstrual period?



Format: DD/MM/YYYY

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