Growth varies a great deal with familial genetics, race, health, etc., but females generally stop growing 12 to 18 months after their first period, or, on average, the "spurt" stage is 10 to 11, they peak at 12, and growth stops at 15 to 16. Males "spurt" stage starts with puberty, around 12 to 13, peaks at 14, and stops around 19, when they begin shaving regularly. However, depending on factors above, females can continue growing into their late teens, and males into their early twenties.