- Otherwise healthy female subjects requesting contraception and currently using a LNG, NGM, or norethindrone/norethindrone acetate containing OC in a 21-day regimen and suffering from at least moderate pelvic pain, headache or both defined by an average of the highest 3 values of >/=35 mm on a VAS during cycle days 22-28 (35 mm VAS is the expected standard deviation of the population VAS reduction)