GNRH1 and ovarian hyperstimulation syndrome: This is somehow in line with the fact that, concerning the development of OHSS, (i) the use of GnRH agonists for ovulation induction after COH with an antagonist protocol can prevent the patient from OHSS and (ii) that the use of a “long protocol” leads more likely to OHSS since ovulation cannot be induced with the “low-risk substances”, i.e. GnRH agonists [19-21].