GABA transmission to GnRH neurons does not change in a diurnal manner in OVX mice. A, B, Representative sPSC recordings in coronal (A) and sagittal (B) slices during negative feedback (top; n = 13 cells, coronal; n = 12 sagittal), surge onset (middle; n = 13 coronal; n = 12 sagittal), and surge peak (bottom; n = 13 coronal; n = 14 sagittal).