Hesperian Health Guides
Due date calculator
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This simple tool can show you what a woman’s due date will be. Learn more about due dates.
Copy this page and paste it onto a piece of cardboard or stiff paper. Then cut the circles out. Put the smaller circle on top of the larger circle and fasten them together through the center.
To use the wheel, point the arrow that says “last monthly bleeding” to the first day of the woman’s last monthly bleeding. The other arrow will then be pointing to the baby’s estimated date of birth.