Yes, sperm can sometimes leak out of the opening of a condom if, for example, your partner leaves the condom on after their erection goes away. If their penis goes soft with the semen still inside the condom, the condom will be loose, and precum and semen can get out, putting you at risk for pregnancy and STDs.
The chances of getting pregnant with a condom depend on the type you use. Condoms that go on the penis work 85% of the time. This means 15 out of 100 people who use them as their only form of birth control get pregnant each year.
Of every 100 women whose partners use the pull out method by itself, four will become pregnant each year if they always do it correctly. But by using condoms and the pull out method together, you and your partner have a high level of protection from pregnancy and sexually transmitted infections.
Doctor's Response. The failure rate of condoms in couples which use them consistently and correctly is estimated to be about 3% during the first year of use. However, the true failure rate during that time period is estimated to be about 14%. This marked difference of failure rates reflects usage error.
Male condoms and internal (female) condoms are considered “coitally dependent” methods, because they are generally employed near the time of sexual intercourse. The male condom has a typical-use failure rate of 13%, and a perfect-use failure rate of 2%.
Condoms are also 98% effective at preventing pregnancy. This means that 2 out of 100 women using male condoms as contraception will become pregnant in a year. In real world use, about 15 in every 100 women a year who use condoms as contraception become pregnant (85% effective).
Pulling out isn't a very reliable way to prevent pregnancy. It works about 78% of the time, which means that over a year of using this method, 22 out of 100 women -- about 1 in 5 -- would get pregnant. By comparison, male condoms are 98% effective when used correctly every time.
Anyone who is worried about accidental exposure to sperm should take emergency contraception as soon as possible. It is safer and more effective than an unintended pregnancy.
The bottom line is that a single act of intercourse between a young couple has on average a one in 20 chance of pregnancy – this assumes the opportunity presented itself on a random day, as these things tend do when you are young.
Many women become pregnant from having sex just one time without birth control. At least 85% of women, who continue to have sex without birth control, even just once in a while, will be pregnant within one year.
However, keep in mind that certain factors can lead to condom failure, like using expired condoms, storing them at the wrong temperature, or using an oil-based lubricant.
If you use condoms perfectly every single time you have sex, they're 98% effective at preventing pregnancy. But people aren't perfect, so in real life condoms are about 87% effective — that means about 13 out of 100 people who use condoms as their only birth control method will get pregnant each year.
Will a thin condom tear? What are thin condoms made of? Thankfully, thin condoms are no more likely to break than standard condoms, and they undergo rigorous testing to make sure. Generally speaking, thin condoms are made from the same durable latex material as standard condoms, just thinner by design.
Do you feel when it rips or breaks? Men wearing condoms should be able to tell when they break — they will feel a change in sensation. Their partners might not be able to feel the difference, so the responsibility lies with them. They can learn what it feels like by breaking condoms on purpose while masturbating.
The idea behind this approach is that since one condom reduces the physical sensation of sex by a small amount, two must reduce it by twice as much. The reality is that “double bagging” generally isn't a good idea.