The harm of ovulation bleeding coitus is more, the most common is to lead to the occurrence of gynecological inflammation, such as endometritis, cervicitis, vaginitis and so on. Whether it is ovulation bleeding, or in the menstrual period, women’s cervical opening is in the open state, coupled with this time women’s resistance is relatively low, poor resistance to disease. If you have sex at this time, it may lead to bacterial infection, vaginitis, cervicitis and other diseases. If the bacteria upstream infection into the uterine cavity will form endometritis, so you can not have intercourse during ovulation. If ovulation bleeding is caused by disease, this time coitus leads to a woman pregnant in the case of the impact on the fetus is also relatively large, so women in the ovulation period to avoid having sex.