Figure 3.

Body weight (in gram) measured weekly of male heterozygous (+∕−) and homozygous (−∕−) 5-HTT knockout mice and their wildtype counterparts (+∕+) that experienced either an adverse (AE, closed symbols) or beneficial (BE, open symbols) environment during adolescence (AE: 5-HTT +∕+ n = 12, 5-HTT +∕− n = 13, 5-HTT −∕− n = 13; BE: 5-HTT +∕+ n = 13, 5-HTT +∕− n = 13, 5-HTT −∕− n = 11). Values are presented as group means ± SEM. Univariate ANOVA: Effect of environment: ^### p ≤ 0.001. Different social experiences started in week 0 (dashed line) and lasted until week 4 (dashed line). Hereafter, animals were singly housed and no longer experienced different environments.