title: [Relationship between breast milk composition and weight growth velocity of infants fed with exclusive breast milk].
abstract: OBJECTIVE
  To study the effect of breast milk composition on weight growth velocity of infants fed with exclusive breast milk.
  
  
  METHODS
  One hundred and thirty-eight full-term singleton infants who received regular follow-up visits and fed with exclusive breast milk and their mothers were recruited. Body height, weight and head circumference of these infants were measured at regular visits. Z scores were used to evaluate growth velocity. The subjects were classified into a failure to thrive group (ΔZ scores≤-0.67), a poor growth group (-0.67<ΔZ scores<0) and a normal control group (ΔZ scores≥0). The samples of mature breast milk were collected for composition analysis. The differences in the levels of the protein, fats, energy, carbohydrates and minerals in breast milk were compared among the three groups.
  
  
  RESULTS
  ΔZ scores for weight in the failure to thrive and poor growth groups were lower than in the normal control group (P<0.05). There was no significant difference in the levels of protein, fats and energy in breast milk among the failure to thrive, poor growth and normal control groups. However, the levels of carbohydrates and minerals in both the failure to thrive and poor growth groups were lower than in the normal control group (P<0.05).
  
  
  CONCLUSIONS
  Weight growth velocity of infants can be affected by the composition of breast milk to a certain degree in a short period. In order to maintain a good weight growth velocity of infants, mothers should have a balanced diet to improve the quality of breast milk.
authors.affiliation: Department of Pediatrics, West China Second University Hospital, Sichuan University/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu 610041, China. xiongfei7922.student@sina.com.
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Huang
authors.forename: Fei
authors.initials: F
authors.lastname: Xiong
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
mesh_terms: D000328:Adult; D001942:Breast Feeding; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008895:Milk, Human / Q000737:chemistry*; D015430:Weight Gain