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There is always a chance that the condom could break. That would then make it possible for sperm to come out. Also, if not put on properly, the condom might no work as well as it should. Also, sperm could come out without the man or woman relaizing it before or after the condom is put on or taking off, which gives chance to pregnancy, too.

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Q: Why are condoms not 100 percent effective?
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Related questions

Are Condoms are 100 percent effective in preventing STD and pregnancy?

Unless they break during intercourse.


Can you be pregnant with a condom without taking any pills?

Yes. Condoms are not 100% effective.


Do your wife and you have to use condoms during the period week of her pill?

No method of birth control is 100% effective, including condoms. Of every 100 couples who use condoms correctly and consistently, only two will experience a pregnancy. The pill is 99% effective if used exactly as prescribed and a day is never missed.


Why 70 percent alchohal is more effective than 100 percent?

100% alcohol is more effective because of the more alcohol concentration in the drink.


Could you get pregnant while he is wearing condom?

Yes, condoms are not 100% effective. Read the label on the box.


If you have an STD will the sex always be painfull?

No; in some cases, such as HIV/AIDS, you may not even be aware you have the disease. That's why people should be tested if they have had unprotected sex (and even such protection as condoms is not 100 percent effective).


The only 100 percent safe way to guarantee that will not contract HIV is?

Abstinence, blood analysis of a transfusion, check if its a new needle if your getting a vaccine. note: Condoms are only 93% effective. (Read the Label)


What type of birth control method is 100 effective?

No- the only 100% effective method, unfortunately, is abstinence. Combining birth control pills/condoms/spermicide would *greatly* reduce the chance of getting pregnant, but there's still a small chance you could.


What is the percent of condoms preventing pregnancy?

If used correctly, couples that rely on male condoms alone have a 85% Success rate. Meaning 15/100 couples who use male condoms only will have an accidental baby. Female condoms are a little less unreliable with a 79% Success Rate. 21/100 couples will have a unintentional pregnancy. The "reliability" figures used for contraceptive methods refer to pregnancies in a year - 85% reliability means that in one year, 15% of women who use the specified method will get pregnant.


What is effective methods of contraception?

Condoms


What are different categories of contraceptive to avoid unwanted pregnancy?

Abstinence - 100% effective Sterilization - 99% + effective IUD - 99% + effective Hormonal (pills, shots, implant, cervical ring, patch) - up to 98% effective Condoms, sponge, cervical cap, diaphragm, spermicide - up to 85% effective Withdrawal - up to 70% effective Please note - Hormonal BC with condoms is up to 99% effective.


What is the only 100 percent effective method of birth control?

Abstinence