Funding
The research reported in this publication was supported by the Eunice Kennedy Shriver National Institute of Child Health & Human Development of the National Institutes of Health under Award Number R21HD095708. Sample collection for the sub-study was supported by National Institute of Child Health & Human Development award number R01HD089831. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. The Evidence for Contraceptive Options and HIV Outcomes (ECHO) Trial was supported by the combined generous support of the Bill & Melinda Gates Foundation [Grant OPP1032115]; the American people through the United States Agency for International Development [Grant AID-OAA-A-15-00045]; the Swedish International Development Cooperation Agency [Grant 2017/762965-0]; the South Africa Medical Research Council; and the United Nations Population Fund. Contraceptive supplies were donated by the Government of South Africa and US Agency for International Development. The contents of this paper are solely the responsibility of the authors and do not necessarily reflect the views, decisions or policies of the institutions with which they are affiliated, the ECHO trial funders, or the supporting governments.