Measuring different aspects of the health of mothers and their newborns is essential to construct a reliable picture of the state of women’s and newborns’ health at global, regional, national and sub-national levels and to track progress towards achieving the aims of the Global Strategy for Women’s, Children’s and Adolescents’ Health (2016-2030). Accurate measurement improves our knowledge of whether effective interventions are being received by pregnant and post-partum women and their newborns, and enables the targeting of resources to those most in need. Various institutions are already engaged in many validation and other measurement improvement activities. In order to develop norms and guidance for the measurement and monitoring of maternal and newborn health, WHO has convened a group of technical experts well versed in such measurement challenges. The guidance and norms will be used to gear the improvements in maternal and newborn health metrics needed to help achieve the relevant objectives set out in the updated Global Strategy.