The vast majority of women’s menstruation is 3-7 days will be clean, the menstrual cycle is 28-30 days / times, in this case after the menstruation even if there is vaginal bleeding is not likely to be pregnant, for the bleeding caused by coitus must pay attention to the following: 1, to understand the vulva, vagina and the cervix is local inflammatory reaction caused by bleeding; 2, must be ruled out the early stage of cervical cancer, the emergence of cervical cancer. After this symptom, go to the hospital as soon as possible to do the corresponding examination, do cervical cancer screening to understand the cervical epithelium whether there is a high-risk HPV infection, epithelial lesions, if there is a problem in the case of timely treatment will eliminate the occurrence of cervical cancer, so this point must be caused by the attention of women.