If the first intercourse does not bleed, clinically there are several possibilities: 1, intercourse failed, in essence, the penis did not enter the vagina, so it will not lead to hymenal laceration, so there is no bleeding phenomenon; 2, because the hymenal hole is relatively large, when the penis goes in and out of the vagina, did not lead to hymenal laceration, this situation may only occur when the vaginal delivery The situation, which is the reason why there is no bleeding in the first intercourse. It is advisable to keep the vulva clean and wash it promptly after sex. And it is also recommended that if you are not planning to get pregnant, you must take good contraceptive measures to avoid causing pregnancy, which clinically requires abortion or medical abortion to achieve the purpose of termination of pregnancy, which is more harmful to the body.