Livingstone Pregnancy Date Wheel, Base Disc Diameter: 108mm, Top Disc Diameter: 76mm, Each

This pregnancy wheel enables swift calculation of projected birth dates, and includes useful general information on week-by-week fetal growth patterns and common pregnancy discomforts. The Pregnancy Wheel is 5 inches in diameter, wider than many wheels in order to maximise readability, and accommodate the quantity of information it presents.