Fig. 3: Forest plot of treatment effects of omega-3 FA for perinatal depression, separated by the ratio of EPA/DHA in omega-3, the ratio ≥1.5 or <1.5.

Two trials did not mention the EPA and DHA content and were not included. SD, standard deviation; Std. Mean difference, standardized mean difference; IV. Random, inverse variance heterogeneity; CI, confidence interval.