Fig. 1
Circadian changes of abdominal temperature (Tabd) and tail temperature (Ttail) in the ovariectomized (OVX) and OVX + estradiol (E2) groups (open and closed circles, respectively), and in the D and P groups (open and closed squares, respectively). The data were obtained while rats were housed in the home cages. Data are presented as means ± standard error (a and c, n = 7 in each group; b and d, n = 5 in each group). *Significant difference between the OVX and OVX + E2 groups (P < 0.05). D, control rats in the diestrus phase; P, control rats in the proestrus phase