Low versus high volume of culture medium during embryo transfer: a randomized clinical trial.

Purpose: The aim of this prospective randomized control trial was to evaluate if the use of two different volumes (20-25 vs 40-45 μl) of media used for embryo transfer affects the clinical outcomes in fresh in vitro fertilization (IVF) cycles.

Methods: In total, 236 patients were randomized in two groups, i.e.