TY - JOUR A1 - Hoorens, S. A1 - Gallo, F. A1 - Cave, J. A1 - Grant, J.C. T1 - Can assisted reproductive technologies help to offset population ageing? An assessment of the demographic and economic impact of ART in Denmark and UK Y1 - 2007 DO - 10.1093/humrep/dem181 VL - 22 IS - 9 ER -