Diaphragms, cervical caps, and vaults are also barriers made of rubber that are inserted into the female reproductive tract to cover the cervix during coitus. They prevent conception by blocking the entry of sperms through the cervix. They are reusable. Spermicidal creams, jellies, and foams are usually used along with these barriers to increase their contraceptive efficiency. Condoms provide the additional benefit of protecting the user from contracting STDs and AIDS