美国儿科学会建议新生儿、儿童、青少年尽早开始补充维生素D,推荐补充量为400IU/d,同时建议早产儿也应补充维生素D,但未指出早产儿维生素D的具体需要量。早产儿需要综合考虑胎儿及新生儿的健康需求,因此,调研维生素D的需要量,明确体内维生素D的状态,评价补充剂量的安全性及有效 The American Academy of Pediatrics recommends that newborns, children and adolescents start vitamin D supplementation as early as possible and recommend a supplement of 400 IU / day. It is also recommended that vitamin D be supplemented in preterm infants, but the specific requirements for vitamin D in preterm infants are not indicated. Preterm infants need to take into account the health needs of the fetus and newborn, therefore, the need to investigate the vitamin D, clear the status of vitamin D in vivo to assess the safety and effectiveness of supplementary doses