Figure 2.

The mean number of days between vaginal estrus obtained by vaginal smears for NMDA-infused (A) and EAA-infused (B) animals, different infusion intervals (C), and EAA plus mating (D) experiments. The number of infusions and the doses are the same as in Figures 1 and 4. Continuous infusion (cont) occurred over 1 h, and pretreatment infusion (pre) occurred as indicated in the text before mating stimulation. Horizontal bars are SEM. *Significantly longer periods of diestrus smears compared with PBS controls in each experiment (p ≤ 0.04–0.001; see Results).