Do not. Urinating after intercourse does not prevent pregnancy.
THE pregnancy occurs from the ovum meeting of the woman with spermatozoa of man. During unprotected intercourse, the sperm are deposited in the vagina and this will cause some of them to reach the ovum for fertilization to occur.
THE urine leaves the bladder of the woman. When urinating, the woman only eliminates urine from your bladder and not the vaginal secretions. Therefore, urinating after intercourse does not prevent pregnancy.
THE pregnancy is prevented with the use of condom or others contraceptive methods such as contraceptive pill, injection, patch, vaginal ring, etc.
If you do not want an unwanted pregnancy, use any of these contraceptive methods in addition to the condom in all sexual relations.