Pattern of milk flow in breast-fed infants.

122 six-day-old infants were test-weighed during breast feeding. Cross-sectional data collection avoided repeated interruptions of individual feeds. Milk flow conformed to a definite pattern: a mean of 50% of the feed from each breast was taken in the first two minutes of sucking and a mean of 80-90% was taken by four minutes. The second half of a ten-minute feed from either breast was almost non-nutritive. Preliminary studies suggest that the pattern is the same after one month of lactation.