I get them. The right birth control pill for me prevents them. I occasionally get other migraines, but those seem to have no correlation to my hormonal cycle. Oh, I should add that I also take a *very* low dose estrogen supplement during week 4, because I'll get headaches for that entire week as well, but those don't appear to be full on migraine (at least, I don't have any aura. pain meds do nothing for them, however). My migraines would hit approx 3 days before my period.