Nowadays women also can use condoms. Like male condoms, they increase protection for partners from pregnancy and STD's. Female condoms look like a sheath with a flexible ring on both sides of this sheath. With these rings the condom is attached to the vagina. It covers the vagina and cervix to prevent sperm from getting inside the woman's uterus. It is necessary to know that female and male condoms should not be used at the same time. In this case, both condoms may rub against each other, and this will result in failure.