1. Recombinant human follicle stimulating hormone (Gonal-F, Serono) compared to urinary follicle stimulating hormone (Metrodin) in IVF cycles: a randomised control study [abstract];Alvino,1995
2. An open, randomized, group-comparative bi-centre study comparing recombinant FSH Follitropinum ß 150 IU and highly purified urinary FSH 225 IU as a fixed dose regimen in IVF/ICSI treatment;Berger;Human Reproduction (Abstract ),1999
3. Recombinant human follicle stimulating hormone (r-hFSH; Gonal-F) versus highly purified urinary FSH (Metrodin HP): results of a randomized comparative study in women undergoing assisted reproductive techniques;Bergh;Human Reproduction,1997
4. Recombinant FSH versus urinary FSH in non-down regulated poorly responding patients;Ferraretti,1999
5. Does recombinant FSH increase embryo viability in poor responder patients?;Ferraretti;Human Reproduction (Abstract),1999