Hi,
PCOS is some times associated with infertility. In PCOS there is elevated LH reversal of the LH/FSH ration as LH becomes higher than FSH. The low levels of FSH allow many follicles to develop but without ever maturing even one follicle. Thus numerous follicles are present in ovaries and once they become ataractic they form cysts, hence the ovaries appear as polycystic. Since the follicles do not mature, they do not release the egg, hence, lack of ovulation is seen. The most likely cause of infertility is anovulation or lack of ovulation. Ovulation can be induced with ovulation drugs [clomid & metformin], by gonadotropins or correction of insulin resistance. The final option for achieving pregnancy in patients with PCOS related infertility is IVF i.e Invitro Fertilization with Gonadotropins.