目的 了解成都市城区母乳喂养婴儿体格发育指标生长速率, 为进行生长发育监测和营养指导提供参考依据。方法 在成都市城区营养良好人群中进行抽样, 共260名纯母乳喂养婴儿进行0～12 月龄生长发育监测, 包括体重、身长、头围测量和喂养情况调查, 共完成16 次随访。结果 母乳喂养婴儿0～12月龄生长发育最快时期为生后3月龄内。成都市婴儿身长、体重和头围增长值在绝大多数月龄与2007年中国六城市资料和2006年WHO标准接近。但成都市男婴和女婴身长增长值在5~7月龄均显著落后于2007年中国六城市资料, 同时, 9～12月女童体重和男童身长增长值低于WHO标准。结论 成都市城区母乳喂养婴儿生长发育轨迹与WHO的标准基本一致, 但在部分月龄婴儿生长发育潜能尚待进一步发挥。

Objective To acknowledge the natural physical growth pattern of exclusively breastfeeding infants in Chengdu city and to provide the reference for growth monitoring and nutritional evaluation. Methods According to the WHO 2006 growth monitoring project, 260 exclusively breastfeeding infants were recruited in Chengdu city.The longitudinal weight, length and head circumference were measured from the birth to 12 months old.The monitoring frequency was 16 times in total. Results The increasing velocities of weight, length and head circumference were the fastest within three months after birth.The velocities of weight, length and head circumference were consistent with the study of breast feeding infants in six capital cities of China in 2007 and standard of WHO in the most of months.But, the velocities of length in Chengdu were lower than the study of breast feeding infants in six capital cities of China in 2007 from 5 to 7 months, at same time, the velocity of boys' length and girls' weight in Chengdu were lower than standard of WHO from 9 to 12 months. Conclusion The growth tendeny is consistent with standard of WHO, and the growth potentia should be improved.