The chemical model was induced by trinitrobenzene sulfonic acid(TNBS) and the mechanical model was induced by colon irritation (CI) during postnatal development.
Efforts are being urged to improve prenatal and postnatal care services, develop a universal childcare services system and reduce family spending on education.
Deficiency syndrome, including deficiency of yin, yang, qi, blood, essence, body fluid and the viscera, is caused either by congenital insufficiency or postnatal malnutrition.
Cerebral palsy doesn't have to happen prenatally, though, and some postnatal causes are things like head trauma, or again an infection or a period of oxygen deprivation.
In cases where postnatal surgery is chosen, it is often done within the first few days of an infant's life, in order to minimize the risk of infection like meningitis.
Relative debilitation of yang is mainly caused by congenital deficiency, or postnatal malnutrition and endogenous impairment due to overstrain, or consumption of yang qi due to prolonged illness.