OXT and major depressive disorder: Results showed that oxytocin synchrony between therapist and patient was associated with effective treatment (Zilcha-Mano et al., 2021), oxytocin plasma levels at baseline predicted improvement in self-rated depression (BDI-II-scores) (Jobst et al., 2018), therapists’ oxytocin response predicted reduction in patients’ depressive symptoms in the next session (Fisher et al., 2023), and oxytocin reactivity was associated with improvement in depressive symptoms (Atzil-Slonim et al., 2022).