Incidence of Lordosis Behavior in the Female Rat Following Removal of the Vomeronasal Organ

Abstract

The lordosis behavior in female rats following removal of the vomeronasal organ (VNO) was observed for a period of 14 hrs by means of a video camera monitor. Although the VNO-ablated female rats received a large number of mounts (96 to 204 times) by sexually active males, they showed only low scores (8 to 22) of lordosis quotients (number of lordosis behavior displayed/number of mounts×100) . In contrast, sham-operated females showed the highest lordosis quotients of 100 as was expected.