Avoiding the use of human chorionic gonadotropin combined with oocyte vitrification and GnRH agonist triggering versus coasting: a new strategy to avoid ovarian hyperstimulation syndrome

In this observational trial, we compared the impact on two different strategies, egg vitrification (n = 152) obtained after triggering final oocyte maturation with GnRH agonists and transferring the embryos at a later stage, with classical coasting (n = 96) to avoid OHSS in patients at risk due to high response to COH. Our results show that oocyte vitrification after GnRH agonists triggering is a highly attractive, safe, and efficient alternative to postpone embryo transfer in patients at high risk of OHSS, resulting in decreased risk for the patient and a better cycle outcome (pregnancy rate 50% vs 29.5%). (Fertil Steril (R) 2011;95:1137-40. (c) 2011 by American Society for Reproductive Medicine.)