The chances of getting pregnant by external ejaculation are zero, because pregnancy requires internal ejaculation, where the sperm and egg meet to form a fertilized egg. In contrast, there is no way for the sperm to meet the egg after ejaculation, so there is no chance of pregnancy. The most common contraceptive measures on the one hand are safe intercourse, the use of an in vitro condom, the placement of an intrauterine device, and also the adoption of in vitro ejaculation, which is not pregnant at the moment. The frequency of 2-3 times a week is the most appropriate. The second thing is to wash the vulva before and after intercourse, to keep the perineum clean and dry, and to receive treatment at the same time when one of the spouses has a sexually transmitted disease.