Preimplantation genetic screening in women of advanced maternal age caused a decrease in clinical pregnancy rate: a randomized controller trial.
Hardarson T, Hansson C, Lundin K, Hillensjö T, Nilsson L, Stevic J, Reismer E, Borg K, Wikland M, Bergh C
Human Reprod. 2008, 23:2806-12

Re-analysis of 166 embryos not transferred after PGS with advanced reproductive maternal age as indication.
Hanson C, Hardarson T, Lundin K, Bergh C, Hillensjö T, Stevic J, Westin C, Selleskog U, Rogberg L, Wikland M.
Hum Reprod. 2009 Nov; 24(11):2960-4

Chromosomal abnormality rate in human pre-embryos derived from in vitro fertilization cycles cultured in the presence of Follicular-Fluid Meiosis Activating Sterol (FF-MAS).
Bergh C, Loft A, Lundin K, Ziebe S, Nilsson L, Wikland M, Gröndahl C, Arce JC; CEMAS II Study Group.
Hum Reprod. 2004 ep; 19(9):2109-17.