The comparison between groups shows that the significant differences between groups were not consistent along the days after infection, appearing only on specific days, with the exception of TNF-α, which was higher on those animals infected at mid-gestation (i.e. G2) than the control animals but also than those infected at early gestation (i.e. G1) on days 12 and 15 pi. The gene discussed is TNF; the disease is infection.