Thank you for consulting in HealthCareMagic. I have gone carefully through the details provide by you and understand your concern. I really needed to know if the child was born preterm and whether he cried properly after birth and whether he suffered from any deficiency of oxygen (hypoxia) during that period. Although there could be other causes, most importantly inadequate oxygenation of blood after birth, due to any cause can cause damage to the brain and may hamper development. Your son needs to be taken to a hospital with facilities of neurodevelopmental followup and developmental assessment. His exact developmental age needs to be assessed and supportive management needs to be given accordingly. Early intervention gives good response. The physiotherapy that your doctor has suggested is important. It is basically passive exercising in order to help him catch up. It needs to be given. Such physiotherapy is available at the centres with neurodevelopmental followup and developmental assessment facilities. Hope my answer was helpful for you. I am happy to help any time. Further clarifications and consultations on Health care magic are welcome. Wish your kid good health.