NCT02639000.

Study name	Effects of blastocyst stage embryo transfer compared with cleavage stage embryo transfer in women ≤ 38 years
Methods	Study type: randomised controlled trial in parallel groups Country: Italy
Participants	Number of participants to be randomised: 388 Age: 18 to 37 years Inclusion criteria: women with infertility undergoing an IVF cycle, with at least 4 fertilised eggs
Interventions	Experimental: blastocyst: embryo transfer of at maximum 2 embryos at blastocyst stage Active comparator: cleavage: embryo transfer of at maximum 2 embryos at cleavage stage
Outcomes	Pregnancy rate; multiple pregnancy rate; implantation rate
Starting date	July 2010
Contact information	Paolo Emanuele Levi‐Setti +39‐0282244505 paolo.levi_setti@humanitas.it
Notes	Study completion: April 2016 Sponsor: Istituto Clinico Humanitas ClinicalTrials.gov ID: NCT02639000