Fig. 3

Locomotor activity and anxiety-like behavior of BALB/c and C57BL/6 female mice during the postpartum period in the light/dark transition test. The light/dark transition test was performed for a 10-min test period in nulliparous, nonlactating primiparous, and lactating primiparous females of C57BL/6J, C57BL/6JJcl, BALB/cAnNCrlCrlj, and BALB/cAJcl strains. a–d Light/dark transition test: a distance traveled (cm) in the dark chamber, b distance traveled (cm) in the light chamber, c time spent in the light chamber (s), d number of transitions between the light and dark chambers, and e latency to enter the light chamber (s). Values are means ± SEM