I en klinisk undersøgelse, hvor man sammenlignede GONAL- f og urin - baseret FSH, var GONAL- f mere effektivt end urin- baseret FSH, idet der krævedes en lavere total dosis og en kortere behandlingsperiode for at opnå præ- ovulatoriske forhold.
However, when these doses were used in a clinical study comparing GONAL-f and urinary FSH, GONAL-f was more effective than urinary FSH in terms of a lower total dose and a shorter treatment period needed to achieve pre-ovulatory conditions.