This chapter reports on a way of measuring abortion where the procedure is illegal, not openly tolerated and socially stigmatized, but in a coun- try context where women are knowledgeable about and willing to report on the abortion experience of their close friends/relatives. In this innovative method, neither a woman who has had an abortion nor a provider who has supplied one is asked to disclose socially sanctioned infor- mation about themselves. Instead, individuals are asked to report on the abortions of their confidants (i.e., those of the women who confide in the respondents). The chapter describes an application in Burkina Faso of this method to obtain more complete reporting by asking about the abortions of others. Qualitative interviews showed that, in this setting, women who are unwilling to talk about their own abortions were more forthcoming about abortions obtained by women in their social network. The methodology converts information on confidants' abortions into measures of abortion prevalence.