Adrenarche means “awakening of the adrenal gland”. There are two adrenal glands, each one lies at the top of each kidney which produce sex hormones that cause some of the changes that are seen when a child's body goes through puberty. For example, pubic and body hair, oily skin, and body odor. When these changes occur early (before 8 years in girls and 9 years in boys), it's called premature adrenarche (during puberty the ovaries and testicles produce the hormones which caused sexual maturity e.g. Breasts etc. in girls and enlarged testes/penis etc. in boy). Learn more about Premature Adrenarche.