P.C.O.S is a metabolic disorder that can affect a woman’s hormonal levels which can affect their ability to conceive. It is believed to affect up to 10% of women and is the major cause of irregular cycles in women. P.C.O.S can often begin with the onset of menarche and remains undiagnosed until a woman tries to conceive. The main cause is believed to be hormonal imbalances including the excess production of the male hormone androgen.