美国儿科学会：母乳喂养的持续时间与白血病发病率降低有关

母乳喂养的持续时间与白血病发病率降低有关，在母乳喂养不少于6个月的婴儿中，发生急性淋巴细胞白血病的风险能降低20%，而发生急性髓系白血病的风险能降低15%。母乳喂养少于6个月也能起到保护作用，但是保护强度会减弱（发病率的降低分别是12%和10%）。然而，母乳喂养的保护效应究竟是一种人乳对恶性肿瘤的直接机制，还是由其减少儿童早期感染的继发效应介导产生，这一问题目前尚未得到解答。 There is a reduction in leukemia that is correlated with the duration of breastfeeding.A reduction of 20% in the risk of acute lymphocytic leukemia and 15% in the risk of acute myeloid leukemia in infants breastfed for 6 months or longer.Breastfeeding for less than 6 months is protective but of less magnitude (approximately 12% and 10%, respectively). The question of whether the protective effect of breastfeeding is a direct mechanism of human milk on malignancies or secondarily mediated by its reduction of early childhood infections has yet to be answered. 来源：http://pediatrics.aappublications.org/content/129/3/e827.full 翻译：http://www.weibo.com/2514526082/zvv2Aev2H