In this study, we examined the usage of online sources and reasons for source selection among first-time Southeast Asian (SEA) fathers when seeking information about pregnancy. We collected data from first-time SEA fathers using semi-structured interviews in Indonesia, as a sample country from the Southeast Asian region. We analysed results using quantitative descriptive analysis and qualitative content thematic analysis. A total of 20 first-time expectant fathers were interviewed. Results show first-time SEA fathers use websites and social media platforms interchangeably when searching for information about pregnancy. They prefer using familiar health-themed sites over other sites and use social media platforms to curate pregnancy-related information. Results have implications for the creation of dedicated websites or specialised social media pages aimed at first-time fathers as the target audience.