Figure 1.

Study timeline. Pigs were reared artificially from postnatal days 2–33. On postnatal day 22, pigs were tested on the novel object recognition test twice using delays of 1 h or 2 days, with task order randomized and counterbalanced between groups. On PND 32–33, pigs were subjected to magnetic resonance imaging; and on PND 33, brain tissue was collected for quantification of hippocampal gene expression. Pigs were weighed daily to track growth.