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The CONSORT dosing algorithm individualizes recombinant human FSH (r-hFSH) doses for assisted reproduction technologies, assigning 37.5 IU increments according to patient characteristics: basal FSH, body mass index, age and antral follicle count. A prospective, uncontrolled, international, 18-centre, pilot study of normo-ovulatory women aged 18-34 years inclusive undergoing a long agonist treatment protocol was performed. Follitropin alfa filled-by-mass (GONAL-f®) dose was assigned by the algorithm and was intended to be altered only for risk of ovarian hyperstimulation syndrome (OHSS). Primary end-point was number of oocytes retrieved. Dose groups containing ≥5 patients were analysed: 75 IU (n = 48), 112.5 IU in = 45), 150 IU (n = 34), 187.5 IU (n = 24), 225 IU (n = 10). Cancellations due to inadequate response were higher than expected in the 75 IU group (12/48). Overall, a median of 9.0 oocytes …