title: The merits of blastocyst versus cleavage stage embryo transfer: a Cochrane review.
authors.forename: Debbie A
authors.initials: DA
authors.lastname: Blake
authors.forename: Michelle
authors.initials: M
authors.lastname: Proctor
authors.forename: Neil P
authors.initials: NP
authors.lastname: Johnson
mesh_terms: D002970:Cleavage Stage, Ovum; D004624:Embryo Transfer / Q000592:standards*; D005260:Female; D006801:Humans; D015201:Meta-Analysis as Topic; D011247:Pregnancy; D011256:Pregnancy Outcome; D018873:Pregnancy Rate; D011272:Pregnancy, Multiple; D016032:Randomized Controlled Trials as Topic; D012196:Review Literature as Topic