The document outlines the opportunities and challenges to adherence in prevention of mother-to-child transmission (PMTCT) programs in Rwanda. It describes the follow-up procedures for PMTCT women in the ante-partum, intra-partum, and post-partum periods. It also outlines the follow-up procedures for PMTCT infants in the intra-partum and post-partum periods. Lastly, it identifies opportunities such as the large proportion of clients tested for HIV and availability of CD4 count machines, and challenges such as the number of visits required and lack of reporting on refills and CD4 count indicators.