7. Use of adequate birth control with female partners of male subjects agreeing to use a medically acceptable form of birth control: (1) surgical sterilization, (2) approved hormonal contraceptives (such as birth control pills or Depo-Provera), (3) barrier methods (such as a condom or diaphragm) used with a spermicide, (4) an intrauterine device (IUD) or (5) post menopausal. Abstinence is not considered acceptable birth control. Postmenopausal woman must have been amenorrheic for at least 12 months to be considered of non-childbearing potential.