D. Glujovsky,A. M. Quinteiro Retamar,C. R. Alvarez Sedo,A. Ciapponi,S. Cornelisse and D. Blake. Cleavage‐stage versus blastocyst‐stage embryo transfer in assisted reproductive technology. Cochrane Database of Systematic Reviews. 2022(5):10.1002/14651858.CD002118.pub6.
