<qa>  What is a spermicide and barrier?9. Female patients must be one of the following: postmenopausal, surgically incapable of bearing children, practicing an acceptable method of birth control acceptable methods may include hormonal contraceptives, intrauterine device, and spermicide and barrier. Abstinence or partnerspouse sterility may also qualify at the Investigators discretion. If a female patient is of childbearing potential she must have a negative urine pregnancy test at screening. 