Puberty is the process of growing from a child into an adult. For girls, this happens when the brain tells the ovaries to start making chemicals called "hormones" that help you grow. There are many things that can shape when you start puberty and what it’s like. In this video, "Girls Talk: What is Puberty?," teens share what puberty was like for them so younger girls can learn from their experience. For more videos in this series, click here.