A–H. Effect of perinatal exposure to mercury (Hg) and curcumin (Cur) on depression of mice offspring inlight-dark test that included (A) latency to enter the dark chamber, (B) transitions, (C) locomotion, (D) wall rear, (E) rear, (F) grooming, (G) light duration, and (H) dark duration. *** shows statistically significant at P < 0.001, from the control and #, ## and ### show statistically significant at P < 0.05, P < 0.01 and P < 0.00, respectively, from Hg group by ANOVA and student's t-test.