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二十年来虽对宫内发育迟缓(IUGR)的死亡率、病率及神经发育后果进行了广泛研究但仍不明了。自Pierre Buden 首先发现新生儿出生体重(BW)与孕龄(GA)不符以来,先后有许多报道低体重成熟儿、宫内营养不良低体重儿、宫内窘迫及低体重儿、宫内发育与出生体重、孕龄、头周径的关系、不能利用月经史或推算孕龄不精确时可应用神经学的或体格发育的标准等文章。为此将新生儿分成适龄(AGA)、小于孕龄(SGA)、大于孕龄(LGA)、早产(<37孕周)、足月(37～42孕周)和过期(>42孕
Although there has been extensive research into the mortality, morbidity and neurological consequences of intrauterine growth retardation (IUGR) over the past two decades, it remains unclear. Since Pierre Buden first discovered that birth weight (BW) is incompatible with gestational age (GA), there have been many reports of low birth weight infants, intrauterine malnutrition, low birth weight infants, intrauterine distress and low birth weight infants, intrauterine development and Birth weight, gestational age, the relationship between head circumference, can not use the history of menstruation or unpredictable gestational age can be applied to neurological or physical development standards and other articles. Newborns are divided into AGA, SGA, LGA, preterm (<37 weeks), term (37-42 weeks), and expired (> 42 weeks)