If your period has ended, it is okay to have sex on the first day after your period ends. Under normal circumstances, intercourse is usually not affected as long as it is not during the menstrual period. Of course, if a woman is in a period of vaginal inflammation, or has a more serious cervical erosion, it is important to avoid intercourse for the time being, because sex can lead to inflammation and further aggravation of the infection. Women are not able to have intercourse during their menstrual period. Intercourse during menstruation can also easily lead to infection, which can easily cause cervicitis, vaginitis, and pelvic inflammatory disease, and some of them may lead to endometriosis, so this situation must be avoided.