Natural methods of contraception were widely used in developed countries until the late 1960s to space and limit childbirth. In France, when the first contraceptive surveys were conducted, researchers noticed that the use of natural methods was underreported, and questions to correct for this bias were subsequently added. The Demographic and Health Surveys do not currently include questions specific to natural methods. We added such questions to the standard DHS question regarding current contraceptive use when we conducted the Health and Demographic Surveillance System of Ouagadougou (2010 Ouaga HDSS) health survey in Burkina Faso among 758 women aged 15–49. Doing so enabled us to find a notable increase in the proportion of women in union who reported practicing contraception: 58 percent, compared with 38 percent in Ouagadougou in the …