Prompt urination after sexual intercourse is not a contraceptive effect. Sex is performed in the vagina, ejaculate into the vagina, and then through the cervix, the uterine cavity into the fallopian tubes and the egg combined to form a fertilized egg; and urine is excreted through the urethra, the two are not the same part, so the timely urination after sex can not play any contraceptive effect. People who need contraception can use condoms, oral contraceptive pills such as drospirenone ethinyl estradiol tablets under the guidance of a doctor for contraception, for married people who do not have the need for childbearing can also be considered for contraception ligation. After sex timely urination can not play a contraceptive effect, the need for contraception in the population should be under the guidance of a professional doctor to take scientific and reasonable contraceptive measures.