Effect of progesterone treatment (in mg/kg) on genital reflexes in paradoxical sleep deprived SHR. Panel A: Percentage of rats displaying genital reflexes and Panel B: Frequency of genital reflexes events. *Different from same-strain (saline); #Different from Wistar strain (cocaine); ¥Different from Wistar strain (saline). §Different from SHR+vehicle group; ‡Different from SHR+25 mg/kg+cocaine of progesterone. In Panel B, data are expressed as mean ± SEM for N = 10.