Why+these+changes+occur

space.template.Wiki research These hormones guide the changes that take place in the body. As well as causing physical changes these hormones also cause emotional changes. **
 * Puberty starts when extra amounts of chemicals called hormones start to be produced in the body.

**Hormones also cause changes in the sweat and oil glands, which can cause** **acne** **and body odour. Hair will also begin to grow under a girl’s arms and around her** **vulva****. The hair on her legs will become more coarse and dark. And she may grow wider hips and larger breasts, although the size and shape of both of these body parts will be different on different girls.**


 * This process of physical changes is known as puberty, and it generally takes place in girls between the ages of 8 and 14, and boys between the ages of 9 and 16. **