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  • Title: PCOSMIC: a multi-centre randomized trial in women with PolyCystic Ovary Syndrome evaluating Metformin for Infertility with Clomiphene.
    Author: Johnson NP, Stewart AW, Falkiner J, Farquhar CM, Milsom S, Singh VP, Okonkwo QL, Buckingham KL, REACT-NZ (REproduction And Collaborative Trials in New Zealand), a multi-centre fertility trials group.
    Journal: Hum Reprod; 2010 Jul; 25(7):1675-83. PubMed ID: 20435692.
    Abstract:
    BACKGROUND: Ovulation induction treatment with metformin, either alone or in combination with clomiphene citrate (CC), remains controversial even though previous randomized trials have examined this. METHODS: A double blinded multi-centre randomized trial was undertaken including 171 women with anovulatory or oligo-ovulatory polycystic ovary syndrome. Women with high body mass index (BMI) > 32 kg/m(2) received placebo ('standard care') or metformin; women with BMI < or = 32 kg/m(2) received CC ('standard care'), metformin or both. Treatment continued for 6 months or until pregnancy was confirmed. Primary outcomes were clinical pregnancy and live birth. RESULTS: For women with BMI > 32 kg/m(2), clinical pregnancy and live birth rates were 22% (7/32) and 16% (5/32) with metformin, 15% (5/33) and 6% (2/33) with placebo. For women with BMI < or = 32 kg/m(2), clinical pregnancy and live birth rates were 40% (14/35) and 29% (10/35) with metformin, 39% (14/36) and 36% (13/36) with CC, 54% (19/35) and 43% (15/35) with combination metformin plus CC. CONCLUSIONS: There is no evidence that adding metformin to 'standard care' is beneficial. Pregnancy and live birth rates are low in women with BMI > 32 kg/m(2) whatever treatment is used, with no evidence of benefit of metformin over placebo. For women with BMI < or = 32 kg/m(2) there is no evidence of significant differences in outcomes whether treated with metformin, CC or both. ClinicalTrials.gov number NCT00795808; trial protocol accepted for publication November 2005: Johnson, Aust N Z Journal Obstet Gynaecol 2006;46:141-145.
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