internal condom
internal condom: a polyurethane pouch that has two flexible rings on either end. During vaginal sex, one ring is inserted into the vagina, and the other ring stays outside the vagina. The rings help to hold the condom in place. Internal condoms are also called “female condoms.” They are 79 percent effective with typical use in preventing pregnancy, and 95 percent effective with perfect use. They also offer protection against some sexually transmitted infections. They can be purchased without a prescription and, when the inner ring is removed, can be used during anal intercourse as well. Internal condoms should not be used at the same time as male condoms.