Growth starts and ends earlier in girls than in boys.
This growth spurt signals that a girl's menstrual cycle will begin in 6 months to 1 year. The growth of the trunk is delayed by one year in comparison to the arms and legs, so limbs appear awkward. Girls who experience their growth spurt earlier or later than others may need reassurance. Body weight and percentage of body fat also undergo changes in the developing adolescent. Development of breasts .