Maternal death has implications for the entire family, although few, if any, interventions have addressed the role that the husband could play in his wife's pregnancy and delivery. The Suami SIAGA Campaign in Indonesia was a multi-media entertainment-education intervention, implemented in 1999/2000, that targeted husbands with messages about birth preparedness. The present paper presents the effects of this campaign (1) on the acquisition of new knowledge by husbands about birth preparedness, and (2) on husbands' action toward becoming an alert husband (a Suami SIAGA). When husbands were directly exposed to the messages from the Suami SIAGA campaign, new knowledge gain and birth preparedness activities occurred. However, the interaction of direct exposure to the campaign and the interpersonal communication stimulated by the campaign about Suami SIAGA was an even stronger predictor of knowledge gain and birth preparedness actions. Limitations of the study included post-only measures and a relatively short time period between the intervention and impact evaluation. We suggest that communication campaigns to educate husbands and to stimulate discussion about the innovative concept of birth preparedness may contribute to improved birth outcomes in Indonesia.