TY - JOUR A1 - Habbema, J.D.F. A1 - Eijkemans, M.J. A1 - Leridon, H. A1 - te Velde, E.R. T1 - Realizing a desired family size: When should couples start? Y1 - 2015 DO - 10.1093/humrep/dev148 VL - 30 IS - 9 ER -