The exact causes of most cases of CP are unknown, but many are the result of problems during pregnancy in which the brain is either damaged or doesn't develop normally. This can be due to infections, maternal health problems, a genetic disorder, or something else that interferes with normal brain development. Problems during labor and delivery can cause CP in some cases. but this is the exception.
Premature babies particularly those who weigh less than 3.3 pounds (1,510 grams) have a higher risk of CP than babies that are carried full-term, as are other low birth weight babies and multiple births, such as twins and triplets. Brain damage in infancy or early childhood can also lead to CP. A baby or toddler might suffer this damage because of lead poisoning, bacterial meningitis, malnutrition, being shaken as an infant (shaken baby syndrome), or being in a car accident while not properly restrained.