Growth spurts are a normal part of child development and will happen throughout your child's life until they reach physical maturity – usually between 16 and 20 for girls and 17 and 20 for boys.

Physical development includes: Rapid gains in height and weight. During a one-year growth spurt, boys and girls can gain an average of 4.1 inches and 3.5 inches in height respectively. This spurt ...

Many boys will get facial hair and everyone gets ... when it might happen and that it is normal. Changes shown are growth spurts, body hair, strength, sperm production, egg release and hormones.