The causes of disability may be usually seen in three stages
- Prenatal – the pregnant mother is either malnourished or contracts any infections. She may either have any kind of trauma, accidents or she is exposed to X rays , use of medications not prescribed by doctors. She may be carrying any chromosomal or genetic anomalies .She may also be an alcoholic ,smoker or drug addict.
- Natal- there may be delayed birth cry and delay birth weight.
- Post natal – After birth the child may have fits or is malnourished.The child may show delay in developmental milestones.