- Women of childbearing age who are pregnant, planning pregnancy in the next 6 months, breast-feeding, or not using medically acceptable means of birth control (hormonal treatment such as birth control pill, injection or implant, IUD, or double barrier of condom and diaphragm together is acceptable; primary use of condom, sponge or diaphragm alone (single barrier) is not acceptable because these may carry a higher rate of failure when used alone