Polycystic ovary syndrome (PCOS) is the expression of a complex alteration of the reproductive system. It is characterised by the increase in androgens, causing symptoms such as hirsutism, as well as infertility in many. This paper reviews whether Clomiphene Citrate, Letrozole and Inositol function better as monotherapy or combined therapy for anovulatory infertile PCOS patients. Ovulation and pregnancy rate were used as primary outcomes. PubMed and Scopus were the search engines of choice. Papers were excluded if patients were undertaking other fertility interventions, overlapping populations and non-RCT papers. It was found that co-prescribing Letrozole or Clomiphene Citrate alongside Metformin should be considered, Inositol should be examined as an alternative insulin sensitiser to Metformin and studies should be undertaken to identify the ideal dose and duration of Inositol therapy. Further large, well-designed, multi-centre studies should be conducted to solidify the claims of this review.
Keywords: PCOS; anovulation; clomiphene citrate; d-chiro-Inositol; fertility; infertility; letrozole; myo-Inositol; ovulation.