Summary of evidence concerning benefits of manual expression and breast compression during pumping

Several studies suggest that manual expression of breast milk, either alone or in combination with pumping, leads to a higher fat content in individual milk samples, including colostrum. This is often attributed to the more effective expression of the low volume fattier portion of milk.

But literature does not specifically evaluate whether manual expression increases the overall 24-hour fat content compared to other expression methods. The focus in the studies is primarily on the fat content of individual expressions or the impact of combining manual techniques with pumping on milk composition. Variability in milk composition and synthesis rates throughout the day complicates definitive conclusions.…