Abstinence Oral contraceptive, either estrogen progesterone combined, or progesterone alone Injectable progesterone Implants of levonorgestrel Estrogenic vaginal ring Percutaneous contraceptive patches Intrauterine device or intrauterine system Double barrier method [condom or occlusive cap (diaphragm or cervical vault caps) plus spermicidal agent (foam, gel, film, cream, suppository)] Male partner sterilization prior to the female subject's entry into the study, and this male is the sole partner for that subject