Pups exposed to gestational stress (Gest-S) showed smaller body weight gain.
Gest-S increased and post-NS decreased pups’ corticosterone plasma levels.
Gest-S-exposed rats showed increased emotionality and stress-related behaviors.
Gest-S exposure increased morphine-conditioned place preference.
Endogenous opiate system may be changed by Gest-S, altering responses to opiate drugs.