Puberty
Puberty is the age when a child's body begins to develop and change and begins their journey towards adulthood. In girls it begins with development of breasts and beginning of their menstruation. For boys it begins with development of a deeper voice or faces the change of voice and facial hair growth begins. The average age for girls or females to reach puberty is 11 years of age, while for boys or males the average age is 12 years of age. But it's varies from person to person. So it usually depends on both environmental and biological factors. With the beginning of puberty a person become capable of reproduction. Children who reaches puberty either very early (before the age of 8) or very late (after 14) is not always abnormal, yet they should seek a professional advice to ensure that there is no medical complication with them.