1. Pregnancy outcome after preimplantation genetic screening or natural conception in couples with unexplained recurrent miscarriage: a systematic review of the best available evidence 
Anna M. Musters, M.D., Sjoerd Repping, Ph.D., Johanna C. Korevaar, Ph.D., Sebastiaan Mastenbroek, M.Sc., Jacqueline Limpens, Ph.D., Fulco van der Veen, M.D., Ph.D., Mariëtte Goddijn, M.D. Ph.D. 
Fertility and Sterility 
Volume 95, Issue 6, Pages e3 (May 2011)
DOI: /j.fertnstert
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions

2. Flow chart: inclusion of studies.
Fertility and Sterility  , e3DOI: ( /j.fertnstert )
Copyright © 2011 American Society for Reproductive Medicine Terms and Conditions