<qa>  What is the name of the type of contraceptive device that is used to control birth?2. Women who are pregnant, lactating, or of childbearing potential who are not using adequate contraceptive measures. The following are considered to be adequate methods of birth control: 1. Intrauterine device IUD; 2. Barrier protection; 3. A contraceptive implantation system Norplant; 4. Oral contraceptive pills; 5. A surgically sterile partner; and 6. Abstinence. Women who are 2years post-menopausal or surgically-sterile are not considered of childbearing potential. All female subjects will have a negative pregnancy test prior to randomization. 