Fertility Blog

Ask the Experts - Metformin & PCOS Treatment

![](http://www.pacificfertilitycenter.com/fertilityflash/vol3-1/team2.jpg)**Q.** I'm confused. I heard that metformin is an alternative to clomid for women who have trouble ovulating, but isn't metformin a drug to treat diabetes? **A.**[clomiphene citrate](http://www.pacificfertilitycenter.com/treatment-care/clomiphene) (brand name: Clomid), which stimulates increased blood levels of FSH (follicle stimulating hormone) and LH (luteinizing hormone) to induce the growth of a follicle and eventual ovulation. Approximately 70% of patients treated with clomiphene citrate will ovulate and 40% will conceive, the majority within three to six ovulatory cycles. A small fraction of patients who see no improvement from clomiphene treatment alone are good candidates for metformin, or a combination of clomiphene and metformin. Offering metformin provides such women with an alternative oral medication before being directed to the injectable stimulation medications. As an insulin-sensitizing medication, metformin decreases insulin levels, which is thought to help restore the normal ovarian hormone profile (reduces male hormone), thus allowing for spontaneous growth of a follicle and ovulation to occur. Alternatively, metformin enables the patient to become more sensitive to clomiphene. It is important to note that of those patients who do not ovulate on clomiphene alone, most benefit by the combination of metformin with clomiphene. Metformin and other insulin-sensitizing medications may offer other benefits for women with PCOS, who are reported to be three times more prone to early pregnancy loss compared to ovulatory women. In several reports involving as yet small populations of PCOS patients, the use of these drugs appears to significantly reduce the rate of early miscarriage. One must approach this news with caution, however, until prospective controlled trials on this topic are conducted.
Posted on January 10th, 2005

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