RESUMEN
Background: Human milk bank is a sustainable source of donor human milk (DHM) which is an acceptable alternative to the mother's milk and it is not routinely available in Nigeria, a multi-ethnically diverse country.The study aimed to assess the willingness to donate or accept human milk among pregnant women and mothers attending the antenatal, immunization, outpatient, under-five, and neonatal follow-up clinics in selected health facilities in Ekiti State, Southwest Nigeria. Study Design and Methods: A descriptive cross-sectional, mixed methods study design was used to collect data in selected health facilities in Ekiti State. Questionnaires and focus group discussions were used to collect quantitative and qualitative data respectively while data analysis was done using the IBM® Statistical Package for Social Science SPSS version 26® and thematic analysis respectively. Results: Of the 798 respondents, 529 (66.3%) and 626 (78.4%) did not know about wet nursing or human milk banking (HMB) respectively and 139 (17.4%) were willing to donate their breastmilk for a stipend. In the focus group discussion, 50% had heard about wet nursing but none heard about HMB. Maternal educational level had a significant impact on their willingness to donate or accept DHM (p < 0.00). Wholesomeness, cultural, and religious biases were major reasons affecting HMB acceptability. Conclusions: Awareness and perception of HMB are poor. Appropriate information, education, and counselling on HMB are needed to drive the adoption and establishment of HMB in Nigeria.