Rhythms of Lhcgr and Fshr expression in whole ovary tissue recovered from LC (n = 3), GCKO (n = 3), and TCKO (n = 3) transgenic mice. In both LC and GCKO mice we detected a significant diurnal rhythm of Lhcgr mRNA abundance (P < .05 for both) that was abolished in TCKO transgenic mice. There was a marked increase in Lhcgr expression at ZT24 in TCKO mice (#, P < .05) when compared with the same time point in both LC and GCKO mice. A low amplitude oscillation of Fshr mRNA expression was detected in GCKO transgenic mice with a peak in the morning (ZT1.99). Daily variation of Fshr mRNA abundance was not significant in either LC or TCKO transgenic mice. Data are presented as mean ± SEM. n = 3 ovaries from 3 different mice per time point. #, P < .05 GCKO vs TCKO; *, P < .05 LC vs GCKO or TCKO. Only those rhythms labeled directly with a P value were considered significant by CircWave analyses. Values for target mRNA abundance were calculated using the ΔΔCT method as described in Materials and Methods, with β-actin as the reference gene. Data were fit to a nonlinear regression (see Materials and Methods).