The merits of blastocyst versus cleavage stage embryo transfer: a Cochrane review

Abstract
This paper is based on a Cochrane review published in The Cochrane Library, issue 2, 2002 (see www.CochraneLibrary.net for information) with permission from The Cochrane Collaboration and John Wiley and Sons. Cochrane reviews are regularly updated as new evidence emerges and in response to comments and criticisms, and The Cochrane Library should be consulted for the most recent version of the review.