It is important to know your estimated due date in order to help plan for the baby's birth.
Test your knowledge of which behaviors are most helpful and harmful to your developing baby.
Here's a tough one: When is an unborn baby most at risk of developing abnormalities?
The gestational age of your developing baby is calculated based on the date of your last menstrual period, the American Pregnancy Association says. The gestational age can be confirmed by an ultrasound between the eighth and 18th week of pregnancy.