Fig. 6

Sexual behavior in male rats. a Mount latency, b intromission latency, c ejaculation latency, d mount frequency, e intromission frequency, f ejaculation frequency, g mount/intromission frequency, h pseudo-ICI (pseudo intercopulatory interval for non-ejaculating rats), i ICI (inter-copulatory interval: ejaculation latency/intromission frequency in each copulatory series), j copulatory rate (the sum of mounts and intromissions divided by the elapsed time (s) from the first mount until an observed ejaculation), k percentage of rats displaying copulatory activity, and l percentage of rats achieving ejaculation, of maternal deprivation (MD) or control (Co) male and female rats treated with leptin (Lept) or vehicle (Vh) from postnatal day (PND) 9 until PND13 (n = 10–12). Ejaculation frequency was increased by leptin in control rats, but decreased by leptin in MD rats, with the inverse effect seen on ejaculation latency. Two-way ANCOVA: (b) main effect of MD. Tukey’s post hoc: *p < 0.05