polycystic ovary syndrome
"Metformin started off good for me. Except for the frequent diarrhea, it worked quickly to give me a normal period. I had no weight loss (though I really need it), and after 3 months my periods became irregular again. My doctor increased my dose after six months, and again after 3. I'm still not regularly regular, and it hasn't increased my ovulation (per a daily ovulation test). This medicine has generally great reviews, but it's very inconsistent for me."