Merck Manual

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Blocking Access: Barrier Contraceptives
Blocking Access: Barrier Contraceptives
Blocking Access: Barrier Contraceptives

Barrier contraceptives prevent sperm from entering a woman’s uterus. They include the condom, diaphragm, cervical cap, and contraceptive sponge. Some condoms contain spermicides. Spermicides should be used with condoms and other barrier contraceptives that don't already contain them.