<![CDATA[Background: Peripartum depression may begin during pregnancy and continue after childbirth. Women in the third trimester commonly experience physical discomfort, hormonal changes, fear of childbirth, and concerns about maternal and infant safety, increasing their vulnerability to psychological distress. Husbands are the closest source of social support, yet their involvement is often limited to practical assistance rather than psychological support. Objective: This study explored husbands’ social support for third-trimester pregnant women in preventing peripartum depression and developed a pocketbook based on identified needs. Methods: A qualitative case-study design was conducted in the working area of Alai Public Health Center, Padang, from January to June 2026. Eleven informants were purposively selected, including three pregnant women, three husbands, three program officers, one media-design expert, and one language expert. Data were collected through semi-structured in-depth interviews, field notes, and documentation and analyzed using data reduction, data display, conclusion drawing, and verification. Credibility was ensured through triangulation, member checking, persistent observation, and an audit trail. Results: Instrumental support was the most consistently provided, including antenatal-care accompaniment, household assistance, financial support, and childbirth preparation. Emotional support remained limited, while informational and appraisal support were also insufficient. These findings informed the development of a practical pocketbook containing peripartum-depression literacy, the four dimensions of social support, warning signs, daily checklists, and childbirth-preparation guidance. The pocketbook was designed to provide husbands with accessible information and practical guidance for recognizing psychological needs and strengthening support during pregnancy. Conclusion: Strengthening husbands’ emotional, informational, and appraisal support alongside practical assistance may improve family-based efforts to prevent peripartum depression. The pocketbook has potential as a practical health-promotion medium for husbands and families, although its effectiveness requires further evaluation.]]>
