Objective To determine whether a single low dose of esketamine administered after childbirth reduces postpartum depression in mothers with prenatal depression. Design Randomised, double blind, placebo controlled trial with two parallel arms. Setting Five tertiary care hospitals in China, 19 June 2020 to 3 August 2022. Participants 364 mothers aged ≥18 years who had at least mild prenatal depression as indicated by Edinburgh postnatal depression scale scores of ≥10 (range 0-30, with higher...
