If a condom is dropped in the vagina, a large amount of semen will enter the vagina and pregnancy will occur. After the semen enters the vagina, it moves quickly to the cervix and enters the uterine cavity to reach the fallopian tubes, where it will unite with the egg to form a fertilized egg if ovulation has occurred, or wait for the egg if ovulation has not yet occurred. If ovulation occurs within the time frame of sperm survival, it will also unite with the egg to form a fertilized egg, which will also result in pregnancy. If a condom is dropped outside of the vagina, the chance of pregnancy is very, very low, so if a condom is dropped inside the vagina, you can take an oral emergency contraceptive pill within 72 hours after intercourse to avoid pregnancy.