3. A female is eligible to enter and participate in this study if she is not breast feeding and is of: non-childbearing potential (i.e. physiologically incapable of becoming pregnant) or child-bearing potential, has a negative urine pregnancy test at screening and agrees to use an acceptable method of contraception during the course of the study or, Female sterilization; or, Sterilization of male partner; or Implants of levonorgestrel; or Injectable progestogen; or Oral contraceptive (combined or progestogen only); or Any intrauterine device (IUD) meet this criterion; or Double barrier method; or Any other methods with published data showing that the lowest expected failure rate for that method is less than 1% per year