: A total number of 89 mothers completed the investigation: 69 (77%) were exclusively breastfeeding, whereas 20 mothers (22.7%) were partially breastfeeding at the time of the interview. Mothers who combined breastfeeding and bottle-feeding presented higher PDSS and EPDS scores. The breastfeeding self-efficacy scores were higher in mothers who exclusively breastfed and were negatively associated (p < 0.001) with both EPDS and PDSS (postpartum depression) scores.