Fig. 5. Litter mass (A) and pup body mass (B) of shaved (filled circles; N=20) and unshaved control (open circles; N=20) mothers. Double-headed arrows indicate period when mothers had dorsal fur shaved off to increase heat loss capacity (days 6–18). ^*Days with significant differences between offspring raised by shaved and control mice. Values are means ± 1 s.d.