GNRH1 and ovarian hyperstimulation syndrome: Patients were initially stimulated by following the GnRH agonist protocol, and women at risk of OHSS (≥ 20 follicles and oestradiol concentration ≥ 3000 pg/mL) were randomised based on the following groups: Group A: the coasting protocol, consisting in continuing with the GnRH agonist and stopping gonadotropins; Group B: the GnRH agonist was discontinued by the start of the GnRH antagonist and gonadotropins doses were reduced.