Acute effects of corticosterone injection on paternal behavior in California mouse (Peromyscus californicus) fathers

► Stress and glucocorticoids (GCs) have been implicated in disrupting parental care ► Very few studies focus on the effects of GCs on parental male mammals ► First-time fathers were injected with corticosterone and tested with their pups ► Corticosterone did not alter behavior, paternal or otherwise, in this species ► Corticosterone did not alter male body condition or reproductive parameters