Live birth rates after transfer of equal number of blastocysts or cleavage-stage embryos in IVF. A systematic review and meta-analysis.

@article{Papanikolaou2008LiveBR,
  title={Live birth rates after transfer of equal number of blastocysts or cleavage-stage embryos in IVF. A systematic review and meta-analysis.},
  author={Evangelosa G Papanikolaou and Efstratios Michaelis Kolibianakis and Herman J. Tournaye and Christos A Venetis and Human Musavi Fatemi and Basil C. Tarlatzis and Paul Devroey},
  journal={Human reproduction},
  year={2008},
  volume={23 1},
  pages={91-9}
}
BACKGROUND Both cleavage-stage and blastocyst-stage embryo transfer policies have advantages and drawbacks. The number of embryos transferred, however, is a crucial parameter that needs to be considered before attempting any comparison. METHODS An extensive literature search yielded initially 282 studies from which 8 randomized controlled trials met the inclusion criteria: (i) truly randomized design (ii) policy to transfer equal number of embryos in both the cleavage-stage and the blastocyst… CONTINUE READING
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