Polycystic ovary syndrome (commonly known as PCOS) is one of the most common hormone disorders, affecting an estimated 1 in every 5 women—which is why it's surprising how many of us a) don't know anything about it or b) find it so hard to find the information we need about it. Here are 7 things about PCOS everyone with ovaries should know. 1. Doctors don't know who'll get it and who won't. "Essentially, PCOS is a series of bead-like ovarian cysts that wreak ...