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Korean Journal of Reproductive Medicine 2008;35(3):223-229.
Published online September 1, 2008.
The Effect of Metformin in Non-Obese Women with Polycystic Ovary Syndrome; Pilot Stud.
Hyeong Ok Kim, Kye Hyun Kim
Department of Obstetrics and Gynecology, Kangbuk Samsung Hospital, Sungkyunkwan University, School of Medicine, Seoul, Korea.
Abstract
OBJECTIVE
This pilot study was performed to investigate the effect of metformin on insulin resistance, hormone levels, and lipid profiles in non-obese patients with polycystic ovary syndrome. METHODS: This study included 16 non-obese patients with polycystic ovary syndrome diagnosed at our hospital from June 2006 to September 2007. Blood samples were collected before and 6 months after metformin treatment for analysis of fasting serum glucose levels, fasting serum insulin levels, a glycemic response to 75 g oral glucose tolerance test (OGTT), and hormonal blood profile including FSH, LH, estradiol, testosterone, free testosterone, serum lipid profiles. Insulin resistance was estimated by calculating fasting glucose/insulin ratio (FGIR), 2 hr glucose/insulin ratio after 75 g glucose load. And we investigated insulin resistance and pancreatic beta cell function by calculating HOMA beta cell function and HOMA IR. RESULTS: After the treatment of metformin, there was significant increase in 2 hr glucose/insulin ratio after 75 g glucose load (p=0.04) and decrease in HOMA IR (p=0.000). But serum lipid profiles did not change significantly. Also the metformin treatment induced a significant reduction in serum free testosterone and LH levels, and LH/FSH ratio (p=0.001, p=0.000, p=0.034). CONCLUSION: This pilot study showed that metformin might be effective in improving insulin sensitivity, ameliorating hyperandrogenemia in non-obese patients with polycystic ovary syndrome. Further investigations with larger number of patients and long-term observations are necessary to determine the role of metformin.
Key Words: Metformin; Polycystic ovary syndrome; Insulin resistance; Hyperandrogenemia


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