As your body grows taller your body will also change in other ways. You will gain weight, and your overall shape will change. Boys shoulders will widen, and their bodies will become more muscular. Their voices will become deeper, their genitals will enlarge. All these changes mean that their bodies are developing correctly during puberty.
Girls usually become curvier, they gain weight on their hips and their breasts develop.
Girls will notice an increase in body fat. Gaining some weight is part of developing into a woman, there is no need to go on a diet. If you ever have questions or concerns about your weight, talk it over with your health care provider or a parent. After one to two years after a girl's breasts start to develop they will experience their first menstrual period. One more change that lets you know that puberty is happening.