Having intercourse just after your period will not cause infection, as long as there is no vaginal bleeding at this time. However, if your sex life is not hygienic, having intercourse when your period is very clean, that is, when you are not menstruating, can also cause infection. Therefore, sexual life should be hygienic, first of all to have a fixed sexual partner, before and after sex both men and women should wash the vulva, to avoid bacteria or viruses are brought to the vagina, causing vaginitis and cervical lesions. Therefore, as long as the menstrual period is all clean, then no problem to have intercourse, when the menstrual period is certainly not intercourse.