The following reasons for pregnancy with condoms are considered: 1. When the condom ruptures during use, the sperm will remain in the vagina and there will be a chance of conception. 2. The size of the condom is not suitable, for example, too large can cause sperm to leak sideways and remain in the vagina and there will be a chance of pregnancy. 3. If the expiration date is exceeded, it will produce rupture or omission or even produce ineffective contraceptive measures, there can be a chance of pregnancy. And condoms can not do 100% contraception, there is a 2%-3% chance of failure, if you want to continue pregnancy, you can go to the hospital for ultrasound to determine whether intrauterine pregnancy, if you want to terminate the pregnancy, you must wait until there is a pregnancy sac in the uterine cavity, before you can choose drug abortion or artificial abortion.