RESUMEN
Pregnancy and postpartum are associated with declines in body image. Research on postpartum body image focuses almost exclusively on the person who gave birth and studies examining protective factors for postpartum body image are scarce. We assessed 257 new-parent couples from mid-pregnancy to 6-months postpartum to examine whether mindfulness-a recognized contributor to psychological well-being-buffered against declines in both partners' perceptions of mothers' body. Mothers' positive body image and partners' perception of mothers' body were collected at four time-points (second and third trimester; 3- and 6-months postpartum); both partners' mindfulness facets-observing, describing, awareness acting, non-judgement, and non-reactivity-were assessed in the second trimester. Dyadic latent growth curve modeling revealed that both partners' perceptions of mothers' body were positively correlated at all moments; however, mothers' positive body image worsened over time, whereas partners' perception of mothers' body remained stable. Mindfulness facets were positively associated with mothers' positive body image (observe, describe, and non-judging) and fathers' (non-judging) perceptions of mothers' body in pregnancy. Mothers' mindfulness facets (acting with awareness, non-judging) were associated with subsequent trajectories of their own body image. By identifying mindfulness facets as targetable protective factors during pregnancy, these findings have implications for future research and interventions focused on perinatal body image.