Why are some 12 year old girls taller than boys of the same age

First of all, no. They aren't all supposed to be taller. It's true that often girls have a growth...

During this year a boy usually grows between 7 and 12 centimetres (2.75 and 4.75 inches) and a gi...

Kids tend to get taller at a pretty steady pace, growing about 2.5 inches (6 to 7 centimeters) ea...

They tend to grow most quickly between ages 12 and 15. The growth spurt of boys is, on average, a...

Girls typically start puberty a year or two before they get their first period and the average ag...