Some of the most frequent mistakes include putting a condom on partway through intercourse or taking it off before intercourse is over, failing to leave space at the tip of the condom for semen, and failing to look for damage before use.
Can you get pregnant while using condoms correctly?
Effectiveness of condoms No method of birth control has a 100% rate of preventing pregnancy. However, if you use condoms correctly, there is a very good chance of preventing pregnancy. Condoms have a 98% rate of effectiveness, meaning there's still a 2% chance that you could become pregnant while using a condom.
Can sperm go through condoms?
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. The only other way sperm (from semen or precum) can leak through a condom is if there's a hole or tear in it.