关键词: 母乳喂养, 婴儿, 生长速率, 纵向研究

Abstract: 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.

Key words: breast feeding, infants, growth velocity, longitudinal study