| Front | What are the three mechanical barriers? |
|---|---|
| Back | Condom, simple plastic layer that semen can't go through, also prevents disease from being transmitted. Femidom, like condom but it's put inside the vagina. Diaphragm, small circular piece of rubber placed over the cervix to prevent sperm from passing through it, useful when used with spermicide and must be placed by professional to be effective. |
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