, Developmental disabilities are the developmental disorders that affect the mental and physical growth of children. These conditions stay for the lifetime of the child and usually are severe enough to interfere with normal everyday functioning. Most developmental disabilities involve certain areas of the child’s development such as language or social skills. The developmental disability that delays overall growth and development of the child in all areas is called ‘Global developmental delay’. As a child grows, it reaches various milestones, such as smiling, recognizing people, turning on a side, crawling, developing hand grip etc. these are the developmental milestones and even though each child is different and grows at its own pace, a general rule exists regarding the tentative age at which these skills should develop in a normal child.