TY - JOUR A1 - Rodgers, J.L. A1 - Kohler, H.P. A1 - Kyvik, K.O. A1 - Christensen, K. T1 - Behavior genetic modeling of human fertility: Findings from a contemporary Danish twin study Y1 - 2001 DO - 10.1353/dem.2001.0009 VL - 38 IS - 1 ER -