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1961年世界卫生组织确定以孕龄37周作为新生儿成熟度的标准。许多学者对孕龄与体重的关系及其与发病种类、发病率及死亡率的关系作了许多研究,引起临床儿科医生开展围产医学工作的重视。我们于1981年
1961 World Health Organization to determine the gestational age of 37 weeks as the standard of neonatal maturity. Many scholars have made a lot of researches on the relationship between gestational age and body weight and its relationship with the incidence, morbidity and mortality, which has attracted the attention of clinical pediatricians in perinatal medicine. We are in 1981