Condoms

What is the efficiency of a condom? Is it totally safe?

• What are the main causes of failure?

Condom users may experience slipping off the penis after ejaculation,breakage due to faulty methods of application or physical damage (such as tears caused when opening the package), or breakage or slippage due to latex degradation (typically from being past the expiration date or being stored improperly). Even if no breakage or slippage is observed, 1–2% of women will test positive for semen residue after intercourse with a condom Different modes of condom failure result in different levels of semen exposure. If a failure occurs during application, the damaged condom may be disposed of and a new condom applied before intercourse begins - such failures generally pose no risk to the user. One study found that semen exposure from a broken condom was about half that of unprotected intercourse; semen exposure from a slipped condom was about one-fifth that of unprotected intercourse. Standard condoms will fit almost any penis, although many condom manufacturers offer "snug" or "magnum" sizes. Some studies have associated larger penises and smaller condoms with increased breakage and decreased slippage rates (and vice versa), but other studies have been inconclusive Experienced condom users are significantly less likely to have a condom slip or break compared to first-time users, although users who experience one slippage or breakage are at increased risk of a second such failure.An article in Population Reports suggests that education on condom use reduces behaviors that increase the risk of breakage and slippage. A Family Health International publication also offers the view that education can reduce the risk of breakage and slippage, but emphasizes that more research needs to be done to determine all of the causes of breakage and slippage. Among couples that intend condoms to be their form of birth control, pregnancy may occur when the couple does not use a condom. The couple may have run out of condoms, or be traveling and not have a condom with them, or simply dislike the feel of condoms and decide to "take a chance." This type of behavior is the primary cause of typical use failure (as opposed to method or perfect use failure). Another possible cause of condom failure is sabotage. One motive is to have a child against a partner's wishes or consent.Some commercial sex workers report clients sabotaging condoms in retaliation for being coerced into condom use. Placing pinholes in the tip of the condom is believed to significantly impact their effectiveness.