Extremely preterm human milk (<28 weeks) Severely preterm human milk (28–31 weeks) Moderately preterm human milk (32–33 weeks) Term human milk Average protein concentration (g/dL) for weeks 1–8 of lactation 2.3 ± 0.5 2.1 ± 0.3 1.9 ± 0.3 1.6 ± 0.4

Table 2: Average protein concentration of milks from term and premature mothers over the first eight weeks of lactation (data from [19]).