极低及超低出生体重儿生长发育比正常同龄儿童落后,各种疾病发病率较高,体重、身高、头围明显低于同龄儿,神经系统伤残患儿比例较高,这种情况在有合并症的患儿中表现更明显。随着医学的进步,死亡率已呈下降趋势,无伤残存活率增加,同时伤残存活率也增加。目前的研究证实,许多因? Very low and ultra-low birth weight children than normal growth and development of children lagging behind, the incidence of various diseases, body weight, height, head circumference was significantly lower than the same age children, the higher the proportion of children with neurological disabilities, this situation in Children with comorbidity performance more pronounced. With the progress of medicine, the mortality rate has been on a downward trend, with no increase in the rate of disability survivability and the increase in the rate of disability survivors. The current study confirmed that many due to?