Fig. 2.

Effect of offspring group on body mass gain from day 5 to day 28 post-hatch. The offspring immune challenge was administered on day 5. Matching between maternal and offspring challenges significantly affected offspring body mass gain (F_{6, 341}=4.44, p=0.0002). Sample sizes are presented in the legend. Offspring in the control group were injected with phosphate buffered saline, offspring in the maternal group were challenged with the same antigen as their mothers, and offspring in the novel group were challenged with an antigen to which their mothers had not been exposed.