One in every 10 women suffer with PCOS, or polycystic ovary syndrome. Some symptoms of PCOS include irregular menstrual cycles, weight gain and elevated blood sugar levels. And with high blood sugar levels come elevated insulin levels. For this last symptom, women take a drug called metformin. In fact, women have been taking metformin for over 4o years. But recent findings show that metformin can increase risk for pregnancy complications.

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