"i have used this medication for about a year now. i have had migraines, but i have them in my genetics so i am not blaming the pill! as far as i know, it has been 100% effective in preventing pregnancy. i have not had a baby grow inside of me lol. my periods have gotten lighter and the start on about the wednesday of the placebo pill week. i just chalk this up to when i used to be on minastrin and that&#039;s when my period used to start on that pill. so all in all, i love it. safe, free with my insurance, great option."