The chance of pregnancy varies, mainly depending on the time of sex. If you ejaculate during the safe period, the chance of pregnancy is about 3%; if you ejaculate during ovulation, the chance of pregnancy is about 30%. If a woman has sex and uses ejaculation for contraception, there is a possibility of unwanted pregnancy, which may cause some damage to the female organism in case of unwanted pregnancy. If you don’t want to have children for the time being, it is advisable to use condoms for contraception, which can achieve the effect of contraception and also prevent sexually transmitted diseases.