[1] Clin Las Condes, Unit Reprod Med, Santiago 6770128, Chile
[2] Sophiahemmet Hosp, IVF Unit, Stockholm, Sweden
[3] Fertil Phys N Calif, Palo Alto, CA USA
[4] Fertil Phys N Calif, San Jose, CA USA
[5] Hop Bicetre, INSERM, U569, Paris, France
[6] Univ Sydney, No Clin Sch, Sydney, NSW 2006, Australia
[7] Egyptian IVF ET Ctr, Cairo, Egypt
[8] Univ New S Wales, AIHW Natl Perinatal Stat Unit, Sydney, NSW, Australia