AmplifyChange has been funding Sexual and Reproductive Health and Rights (SRHR) advocacy for over five years. This Evidence Brief adds to the body of evidence (Aston 2019, Forti 2012, International Initiative for Impact Evaluation 2017, Jones 2011, Tsui 2014) on how advocacy works and how to measure its impact. We present analysis of AmplifyChange grantee data which clearly shows that AmplifyChange grantees have secured positive changes in policies and laws, even in the most repressive of environments and the most challenging of issues.