TED: Arunachalam Muruganantham: How I started a sanitary napkin revolution! - Arunachalam Muruganantham (2012)

Summary: When he realized his wife had to choose between buying family meals and buying her monthly "supplies," Arunachalam Muruganantham vowed to help her solve the problem of the sanitary pad. His research got very very personal -- and led him to a powerful business model. (Filmed in Bangalore as part of the TED Global Talent Search.)