The fourth day of menstruation intercourse pregnancy chances, but may lead to inflammation, whether you need to do remedial measures, the main whether there is discomfort, a menstrual intercourse is generally not a great impact on the child. 1. do not need to remedy the situation: occasionally menstruation coitus lead to inflammation of the chances of existence, but pay attention to the hygiene of the chances are not great. Before and after sex, both men and women should pay attention to washing the vulva, no symptoms can be observed. 2. Need to remedy the situation and methods: If both men and women do not pay attention to hygiene before sex, especially if one of the men and women have vulvar or vaginal inflammation, or excessive friction caused by sex vulvar edema, etc., you need to consult a doctor in a timely manner. You can’t have sex during menstruation, it’s not good for your health, we suggest you do a good job of menstrual hygiene.