Infant sex predicts breast milk energy content

@article{Powe2010InfantSP,
  title={Infant sex predicts breast milk energy content},
  author={Camille E. Powe and Cheryl D Knott and Nancy Lou Conklin-Brittain},
  journal={American Journal of Human Biology},
  year={2010},
  volume={22}
}
During human evolutionary history, and for many around the world, breast milk is the primary source of nutritional energy for infants. [] Key Method We quantified nutrient and energy content of breast milk from 25 healthy, well-nourished Massachusetts mothers with infants aged 2-5 months. We examined several potential sources of variation in milk quality, particularly feeding patterns, infant sex, and maternal breast growth during pregnancy. After controlling for time since last feeding, a known correlate of…
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152 Citations
Highly Influential Citations
5
Background Citations
62
Methods Citations
2
Results Citations
8

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      References

      SHOWING 1-10 OF 24 REFERENCES
      Maternal anthropometric status and lactation performance in a low-income Honduran population: evidence for the role of infants.
      TLDR
      Assessment of breast milk volume and composition in 141 low-income women in Honduras indicates that infant characteristics, such as birth weight and the ability to self-regulate intake in response to milk energy density, mediate the relationship between maternal anthropometric status and lactation performance.
      The Copenhagen Cohort Study on Infant Nutrition and Growth: breast-milk intake, human milk macronutrient content, and influencing factors.
      TLDR
      The hypothesis that maternal fat stores laid down during pregnancy are easier to mobilize during lactation than are other fat stores and, if low, may limit milk fat when exhausted is supported.
      Volume and Frequency of Breastfeedings and Fat Content of Breast Milk Throughout the Day
      TLDR
      Breastfed infants should be encouraged to feed on demand, day and night, rather than conform to an average that may not be appropriate for the mother-infant dyad.
      Breast-milk fat concentrations of rural African women
      TLDR
      Long-term variations in breast-milk fat concentration of mothers feeding on demand were studied in 120 rural West African women over a 12-month period and a mother's relative breast- milk fat concentration was not correlated with her levels of dietary energy intake and breast- milk output but was positively correlated withHer relative subcutaneous fat deposits.
      The influence of breast surgery, breast appearance, and pregnancy-induced breast changes on lactation sufficiency as measured by infant weight gain.
      TLDR
      The findings from this study indicate that certain biologic and surgical breast variables are associated with lactation insufficiency.
      Lactational capacity of marginally nourished mothers: relationships between maternal nutritional status and quantity and proximate composition of milk.
      TLDR
      The findings suggest that, despite their remarkably good lactational capacity, the mothers' milk production was limited to some extent by their nutritional status and may, therefore, be further increased with nutritional improvement.
      Degree of breast emptying explains changes in the fat content, but not fatty acid composition, of human milk
      TLDR
      Within and between breastfeed variability in the relative proportions of the seven major fatty acids of milk fat are observed and these changes are discussed with reference to the control of fat synthesis in the human mammary gland.
      Variation in fat, lactose and protein in human milk over 24 h and throughout the first year of lactation.
      TLDR
      The results show the individuality of milk composition and suggest that only a rigorous sampling routine that takes into account all levels of variation will allow the accurate determination of infant intake of fat, lactose, protein and energy.
      Determinants of energy, protein, lipid, and lactose concentrations in human milk during the first 12 mo of lactation: the DARLING Study.
      TLDR
      It is suggested that milk composition is more sensitive to maternal factors such as body composition, diet, and parity during later lactation than during the first few months.
      Circadian variation in fat concentration of breast-milk in a rural northern Thai population
      TLDR
      Fat concentration declined between feeds in proportion to the length of time between feeds, but the decline was less between sleep feeds than between waking feeds, a reflection of the lower post-feed fat concentration and higher pre-feedfat concentration of sleep feeds compared with waking feeds.
      ...
      1
      2
      3
      ...