Hi, I have poly cystic ovaries but not PCOS. I have done 2 rounds of IVF as I have endometriosis as well my FS found that my ovaries create a lot of follicles but the eggs I produce aren't of a great quality that's is how he determined that my ovaries are poly cystic. I was put on metformin as they have done research to prove that PCOS and your insulin levels are linked and if they can control your insulin levels it is more likely that you can produce better quality eggs. Most of this was all only learnt in my case after all of my embryos from my 1st IVF cycle failed to grow pasted day 3. I have learnt that very few cases are the same an it is all trial and error with sucks!