Fig. 3. Total water turnover (rH₂O_fem) as a function of body mass for lactating (filled circles, y=–19.07+1.09x, N=24) and nonreproductive (open circles, y=–3.34+0.26x, N=24) female mice at 30°C. rH₂O_fem was measured when the reproductive females were at day 14 of lactation. Body mass is the mean value for days 9–13 of lactation (reproductive females) or the mean value for eight consecutive days before the day of doubly labelled water (DLW) injection (non-reproductive females).