Less than half of all sexually active unmarried women use a modern contraceptive method, a fraction that has barely changed from 2000 to 2011. However, only ~26% of married women used contraceptives in 2011. The use of contraceptives also differs substantially between poor (~15%) and wealthy women (~40%). As a result, Ugandan women have ~6 children while they prefer to have around ~4. According to the 2011 Uganda Demographic and Health Survey (DHS), more than 40% of births are unplanned. In 2010, the Ugandan Ministry of Health estimated that unsafe abortion accounted for 8% of the country's maternal deaths. The 2006 Uganda Demographic Health Survey (UDHS) indicated that roughly 6,000 women die each year from pregnancy-related complications. Pilot studies in 2012 by Future Health Systems have shown that this rate could be significantly reduced by implementing a voucher scheme for health services and transport to clinics.