Another legitimate reason is if a mother's pregnancy has lasted beyond her 40-week "due date."

In humans, a pregnancy normally lasts for about nine months.

Giving birth to one baby at a time is common and the pregnancy usually lasts two to three months.

A normal pregnancy lasts 40 weeks after the first day of the last menstrual period.

He was talking gibberish again - a pregnancy lasts no longer than two hundred and fifteen blue days.

Each pregnancy lasts for three months, three weeks, and three days.

The first two pregnancies hadn't lasted till term, but everyone had great hopes for the third.

A normal pregnancy lasts about 40 weeks from conception to the birth of a baby.

A recent study suggests that a father's genes may play some role in determining how long pregnancy lasts.

A human pregnancy normally lasts nine months, the basis of the Naegele's rule.