Fig. 1. Mean daily food intake of the control (filled circles) and experimental (open circles) mice throughout the first lactation (A), second pregnancy (B) and second lactation (C). In the experimental animals, the second pregnancy occurred concurrent with the first lactation; in the control animals, the second pregnancy occurred after completion of the first lactation. Values are means ± S.E.M. N=19 for the controls and N=24 for the experimental mice in A, and N=21 for experimental females in C. In B, the sample size for the experimental mice varied over time depending on when pregnancy was initiated relative to when the male was removed. Sample sizes for sequential points are 1, 1, 1, 3, 5, 8, 11, 16, 19, 21 and 21.