It is also possible to get pregnant by putting sperm into the vagina by hand. Usually the semen liquefies about 10-30 minutes after ejaculation, when the sperms gain more mobility. Even if you put the sperm into the vagina by hand, they will keep moving forward while the sperm are viable. At this time, if you are in the period of ovulation and an egg is released, the sperm will combine with the egg to form a fertilized egg, so there is a possibility of pregnancy. If you want to get pregnant, it is best to opt for internal ejaculation; it is not advisable to put the sperm into the vagina by hand. If you are not planning to get pregnant, you should always take precautions when having sex and not take any chances to prevent unwanted pregnancy.