Puberty is the process of physical changes during adolescence through which a child's body matures into an adult capable of reproduction. It is initiated by hormones from the pituitary gland and causes development of primary sex characteristics. For females, puberty begins with estrogen production leading to breast development, menstruation, and fertility. For males, testosterone production causes genital and muscle growth, deepening of the voice, and sperm production. Both experience physical, mental, and emotional changes as they transition into adulthood. Maintaining good hygiene practices is important for caring for their changing bodies during this time.