PACTR201402000773124.

Study name	Blastocyst versus day 2 transfer in low responders
Methods	Parallel: different groups receive different interventions at same time during study Randomised: permuted block randomisation (block size = 4) and the block size was not variable Sealed opaque envelopes
Participants	Inclusion criteria: poor response to ovarian stimulation as defined by European Society of Human Reproduction and Embryology (ESHRE) consensus (the Bologna criteria) (2011) Exclusion criteria: only one immature oocyte retrieve
Interventions	Blastocyst versus day 2 embryo transfer
Outcomes	Clinical pregnancy with cardiac pulsation
Starting date	25 June 2013
Contact information	elsayedamr@yahoo.com
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