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低出生体重(low birth weight,LBW)是指胎儿分娩时的体重<2 500 g~([1]),尽管在产科预防、诊断及治疗方面都有进展,但LBW仍是新生儿发病和死亡的首要原因。目前,我国LBW在新生儿中的比例仍维持在2.21%~2.40%。LBW易导致多种并发症,如先天异常、远期的神经系统并发症、呼吸系统疾病及行为问题等~([2])。许多因素与LBW的发生有关,目
Low birth weight (LBW) refers to the weight of the fetus at childbirth <2500 g ~ ([1]). Although there are advances in obstetric prevention, diagnosis and treatment, LBW is still the neonatal morbidity and mortality The primary reason. At present, the proportion of LBW in newborns remains at 2.21% ~ 2.40%. LBW easily lead to a variety of complications, such as congenital anomalies, long-term neurological complications, respiratory diseases and behavioral problems such as ~ ([2]). Many factors related to the occurrence of LBW