Figure 1. Effects of rearing condition on male copulatory behavior in 3 consecutive weekly sessions.
Male rats reared in an enriched environment (EE, blue dots) showed a decreased number of ejaculations (A) and intromissions (C) and prolonged ejaculation latencies (B) compared with rats reared in a standard environment (SE, green dots). On the other hand, there were no group differences in intromission latencies (D). *P<0.001 compared with SE, ANOVA for repeated measures.