It was aimed to evaluate the effect of visual and auditory stimuli presented to father candidates on postpartum breastfeeding success of mothers, perception of spousal support and postpartum depression. The study, which was carried out in a randomized controlled experimental design, consists of nulliparous pregnant women and their spouses who came to the relevant health center for prenatal control between May 2023 and May 2024. In the study, 132 pregnant women (Experimental group 1:44, Experimental group 2:44, control group:44) were recruited with a priori power analysis. In the study, women and their spouses were assigned to the experimental and control groups by randomization. For randomization, single-group columns between 1-165 were created in the system using the Random Integer Generator method in the Numbers subheading of the random.org website. Considering the numbers 1, 2 and 3 in the column, nulliparous pregnant women coming to the polyclinic were randomly assigned to these numbers. Which numbers constitute which group was determined by drawing lots at the beginning of the research. In data collection, Introductory Information Form for women, Women's Perceived Spousal Support Scale in Early Postpartum Process, Breastfeeding Self-Efficacy Scale-Short Form, Breastfeeding Adaptation Scale and Edinburgh Postpartum Depression Scale; Introductory Information Form for men, Fathers; Breastfeeding Attitude and Participation Scale and Edinburgh Postpartum Depression Scale (for Men) were used. Data; It was evaluated in the SPSS program.