Figure 2.

Maternal attributes of SM/J and LG/J mice inbred females. (a) Maternal performance: prepartum nest indicates the percentage of females with good quality, prepartum nests; postpartum nest indicates the percentage of females with good quality, postpartum nests; milk at first day is the percentage of females that had pups with milk in their stomachs on the first day after delivery, indicating lactation; pup retrieval indicates the percentage of females exhibiting defensive maternal behavior at postpartum day 1, returning pups to the nest during the 6 min following the disturbance (n= 30 SM/J; 23 LG/J). (b) Forced swim test activity: time spent immobile in the final 4 min (n= 10 each group on sixth day after delivery). Means ± SEM; **P < 0.01. (c) Elevated plus maze activity: relative number of entries and time spent on open arms in relation to closed arms in 5 min (n= 10 each group on fourth day after delivery). Means ± SEM; *P < 0.05.