This Policy Brief is the result of a participatory research using citizen science methodologies where women have acted as co-researchers talking in first person about endometriosis in Catalonia. The research aims to explain and raise awareness about how endometriosis is experienced and how it affects people's overall health, as well as for the women themselves to generate first-person recommendations to improve diagnostic and care services. This Policy Brief is aimed at policy makers and health professionals. This research has been made possible thanks to the active participation, motivation and enthusiasm of 20 women co-researchers who have been involved in the different phases of the scientific process. We are very grateful for their support, dedication and effort throughout the research, and we hope to achieve, as they wish, an impact on public health policies that will result in an improved approach to endometriosis at the health level that will improve the quality of life of present and future patients. This citizen science pilot is part of the European TRANSFORM project (grant agreement N.872687). This document reflects the views only of the authors, and neither the European Commission nor the Research Executive Agency can be held responsible for any use which may be made of the information contained therein.