Caz & Bob, clomid is not good for women that have endometriosis. Clomid increases estrogen levels and this can cause endo to grow. Using Femara does the same thing as clomid (induces superovulation), but it doesn't lead to endo growth. REs that know a lot about endo typically will start their endo patients on femara instead of clomid. If you are strictly PCOS then clomid is a fine option.