abnormal uterine bleeding
"My experience with contraceptives has been a rocky one. Levlen, so far, has been the only contraceptive I've tried that did not lead to constant black discharge. I've the implanon and several times have been prescribed slightly different pills, and there was absolutely nothing I could do to regular my discharge and periods, sometimes for months at a time. After taking Levlen for two days, my discharge would return to normal. It is definitely my preferred contraceptive method :)"