Funding
This work was funded by the Bill & Melinda Gates Foundation (Grant #OPP1084318); The United States Agency for International Development (USAID); and the UNDP-UNFPA-UNICEF-WHO-World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP), a cosponsored program executed by the World Health Organization (WHO). The funders had no role in design, data collection and analysis, decision to publish, or preparation of the manuscript.