Until the 1700's, pregnancy often ended in death for a mother and baby. But in 20th century, medical knowledge developed quickly than ever before and control of infectious disease meant for prominent increased birth rate of children's. The study of growth and development of babies and children and the treatment of disease experienced among the child during their childhood are called pediatrics. Children health is of a great concern to any parent because their prone to infections, suffer minor injuries, unhealthy habits and so on and taking care of their physical, mental and psychological wellbeing is a duty that is mainly dependent parents and doctors. A hygienic environment and a well diet food with equal amount of nutrition can be enough to support his physical and mental development. A thorough understanding of child behavior is required in order to pamper them with their necessities.