Fig. 1From: Sex-specific effects of neonatal progestin receptor antagonism on juvenile social play behavior in ratsExperimental overview. Male and female rats were injected with the PR antagonist CDB or vehicle control on PN0, 2, and 4 then weaned into mixed-sex cages of 5–6 on PN21. Play behavior was observed in the home cage from PN25-29 and social discrimination was measured on PN33 or PN34Back to article page