The document summarizes an operations research study conducted in Bangladesh to introduce emergency contraception (ECP) and determine the most effective delivery model. The study compared an on-demand delivery model, a prophylactic delivery model where ECP was provided in advance, and a control group. The study found knowledge and use of ECP was far greater in the prophylactic areas compared to the on-demand areas or control areas. The probability of using ECP was 5 times higher when provided prophylactically or with an informational brochure. Based on positive findings, the national family planning program approved including ECP and is scaling up access. The study demonstrated how operations research can inform policy and translate to action.