TY - JOUR A1 - Mascarenhas, M.N. A1 - Flaxman, S.R. A1 - Boerma, T. A1 - Vanderpoel, S. A1 - Stevens, G.A. T1 - National, regional, and global trends in infertility prevalence since 1990: A systematic analysis of 277 health surveys Y1 - 2012 DO - 10.1371/journal.pmed.1001356 JF - PLOS Medicine VL - 9 IS - 12 ER -