为降低晚发性出血症的发病率 ,减少后遗症 ,提高生存质量 ,对我科 1998年 10月～ 2 0 0 1年 10月收治的 5 6例晚发性出血症患儿作回顾性分析。资料显示发病年龄 1～ 3个月4 4例 (78.6 % ) ,母乳喂养足月儿 5 2例 (92 .9% ) ,生长发育良好 ,入院时可见性出血者仅 7例 (12 .5 % ) In order to reduce the incidence of late-onset hemorrhagic disease, reduce sequelae and improve the quality of life, we retrospectively analyzed 56 children with late-onset hemorrhage treated in our department from October 1998 to October 2001. The data showed that 44 cases (78.6%) were aged from 1 to 3 months and 522 (92.9%) were breast-fed term infants, with good growth and development. Only 7 patients (12.5% )