“…The index p presents a different perspective of family planning progress than the traditionally used contraceptive prevalence (CPR) or modern methods prevalence (mCPR) or the recently recommended demand satisfied by modern methods (MDM) which is also one of the progress indicators of Goal 3.7 of the United Nations 2030 Sustainable Development Agenda (United Nations, 2015). The rationale for using CPR or mCPR to chart family planning progress may be traced to the strong negative relationship between CPR or mCPR and total fertility rate (TFR) based either on cross-country data (Bongaarts, 1978;Bongaarts and Potter, 1983;Ross and Mauldin, 1996;Jain, 1997;Tsui, 2001;Stover, 1998;United Nations, 2020) or on longitudinal data (Bongaarts and Hodgson, 2022). Many country-specific studies, especially in the context of sub-Saharan Africa, however, have highlighted the inconsistency between CPR and TFR (United Nations, 2020; Westoff and Bankole, 2001;Adamchak and Mbizvo, 1990;Bongaarts, 1987;Thomas and Mercer, 1995;Jurczynska, Kuang and Smith, 2016;Jain et al, 2014).…”