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  • Title: Metformin metabolic and vascular effects in overweight/moderately obese hyperinsulinemic PCOS patients treated with contraceptive vaginal ring: a pilot study.
    Author: Morotti E, Giovanni Artini P, Persico N, Battaglia C.
    Journal: Gynecol Endocrinol; 2019 Oct; 35(10):854-861. PubMed ID: 31081406.
    Abstract:
    The aim of this pilot study was to assess how metformin, associated with a contraceptive vaginal ring, may influence lipid and carbohydrate metabolism, fat distribution, and surrogate markers of arterial function. Among 62 patients, 25 were treated with vaginal ring plus metformin and 37 women with only vaginal ring. The effects were assessed after 6 months. The patients were submitted to evaluation of lipid and carbohydrate metabolism; extended view ultrasonographic evaluation of fat distribution; Doppler analysis of ophthalmic artery; brachial artery flow-mediated vasodilatation; oral glucose tolerance test. After 6 months, the body mass index and waist/hip ratio resulted significantly better in patients who associated metformin to vaginal ring. The fasting glucose, insulin, and glucose/insulin ratio, HOMA-IR, glucose, and insulin AUC 120 were significantly improved in metformin group. The ultrasonographic fat analysis resulted significantly better after metformin. The ophthalmic artery PI significantly improved in metformin group. The brachial artery vasodilation was better in metformin treated patients. In conclusion, metformin, associated with vaginal ring, improves the insulin and carbohydrate metabolism, reduces the body weight and android fat distribution. This, associated with the significant improvements of surrogate markers of arterial function, may be responsible of possible cardiovascular and cerebrovascular protective effects.
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