- For all women of childbearing potential, a negative pregnancy test must be obtained at the baseline visit before starting study treatment. For women who are not postmenopausal (≥ 12 months of non-therapy-induced amenorrhea) or surgically sterile (absence of ovaries and/or uterus): agreement to remain abstinent or use two adequate methods of contraception, including at least one method with a failure rate of < 1% per year, during the treatment period and for at least 90 days after the last dose of study drug.