22 Mar 2007
Barrier Methods
What they do: Physically stop sperm from reaching the egg, thereby preventing pregnancy.
What it is: A thin sheath that covers the penis, trapping semen inside.
Pros: Cheap, and easy to use. Latex condoms are the only form of birth control that protect against sexually transmitted infections.
Cons: Have to interrupt the moment to use one. Can tear, rip or fall off.
Effectiveness: 88-90%, up to 98% effective if used with spermicide.
What it is: A latex shield inserted in the vagina to block sperm.
Pros: Must remain in the vagina for six hours after sex, so you can have sex as often as you want during that time.
Cons: Must be fitted for one by a doctor. Insert it an hour before intercourse and use with contraceptive jelly. Can be messy.
Side-effects: None
Effectiveness: 92-96% with a spermicide
WB Health Article Summer 2006
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