Building a gender-responsive statistical system requires a recognition that statistics are a gendered area. National statistical systems (NSS) and other non-state data producers need to adequately represent the situations, conditions and concerns of the whole population - in all its diversity - to appropriately address the most important policy issues of modern societies and economies. An awareness that women, men and diverse sub-populations can have different life experiences and react differently to policies and programmes provides the basis for inclusive governance. This gender statistics module of the National Strategy for the Development of Statistics (NSDS) Guidelines complements the NSDS lifecycle and seeks to help its readers, including national statistical offices (NSOs), line ministries and gender equality advocates, to understand the importance of addressing challenges related to gender data during statistical planning processes, and throughout their implementation, monitoring and evaluation.