These methods appear to be mechanical ones and they helps in preventing the deposition of sperms of male into the vagina of the female and finally their passage into the uterus .
The devices used in barrier methods are
I- Condom
A sheath made of latex rubber , plastic or silk that is fitted over the penis during sexual intercourse .
II- Diaphragms , Cervical caps and Vaults
These are the barriers made up of rubber . These are inserted into the female genital tract to cover the cervix during copulation .
III- Femidom
It is a flexible female condom . It consists of a loose fitting sheath and two rings . One polyurethane ring remains outside the vagina and is a guide for insertion of penis .
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