Volume 59, Number 3-4 Vol. 59, 2004/3 - pagesPages 347 to 356IntroductionBy Nathalie Bajos, Henri Leridon, Nadine Job-Spira, translated by Godfrey RogersPages 357 to 385Attrition in the COCON Cohort Between 2000 and 2002By Nicolas Razafindratsima, Ngoy KishimbaPages 387 to 414The Pill and the Condom, Substitution or Association ?By Clémentine Rossier, Henri Leridon, Equipe CoconPages 415 to 437Social Inequalities in Access to Contraception in FranceBy Nathalie Bajos, Pascale Oustry, Henri Leridon, Jean Bouyer, Nadine Job-Spira, Danielle Hassoun, Equipe CoconPages 439 to 454Question Comprehension and Recall : The Reporting of Induced Abortions in Quantitative Surveys on the General PopulationBy Caroline Moreau, Nathalie Bajos, Jean BouyerPages 455 to 555The Demography of Sub-Saharan Africa from the 1950s to the 2000sBy Dominique Tabutin, Bruno Schoumaker, translated by Mireille RabenoroPages 557 to 558Book Reviews