Condoms are highly effective when used correctly and consistently. They are about 98% effective at preventing pregnancy with perfect use, but with typical use, their effectiveness is about 87% , meaning around 13 out of 100 people relying only on condoms may get pregnant in a year. Condoms also significantly reduce the risk of sexually transmitted infections (STIs), including HIV, by creating a barrier that blocks exposure to bodily fluids. Consistent and correct condom use reduces HIV transmission by approximately 71% to 80%. However, their effectiveness can be reduced if condoms tear, leak, slip off, or are used incorrectly. Choosing the right size and using water- or silicone-based lubricants (not oil-based) can increase condom effectiveness and reduce the risk of breakage. Using condoms together with another form of birth control further enhances pregnancy prevention. Condoms are also the only method that protects against most STIs including HIV, unlike many other birth control methods. In summary, condoms provide a highly effective and accessible method for both preventing pregnancy and protecting against STIs when used properly every time during sex.
