Girls should have breast development by age 14 and menses by two years after breast development. Start by talking with your child's physician about your concerns. Children with a delay in puberty may benefit from a consultation with a pediatric endocrinologist. My child is overweight. It is very unusual for a child to be overweight because of a hormone problem.
Most overweight children are heavy for other reasons.
Talk with your child's doctor about your concerns. Your child's doctor can screen your child for the various causes of obesity.