Norethindrone
"I've been on this for a month now. No weight gain, which was my main concern for going back on birth control.  I also feel the same stress wise, so thats a plus; it hasn't added any extra "craziness" to my life like previous birth control has. However, I haven't had a period yet.. I haven't taken a pregnancy test, but I'm thinking it is just my body just adjusting to it and the normal stress from graduate school.  Overall I'm happy with this birth control."