<qa>  What is the name of the drug that is used to control the fetus?- Females who have had at least one menstrual cycle must either be abstinent or must be using an effective method of birth control e.g. intrauterine contraceptive device, oral contraceptive, diaphragm or condom with contraceptive jelly, cream, or foam. This will be documented at each visit. Additionally, they must test negative on a urine pregnancy test which will be administered at every visit. Subjects will be informed that because the drug remains in the body for many years, it is possible that a developing fetus could be harmed by the drug even if a woman stops taking the drug long before she becomes pregnant. 