If bleeding occurs during intercourse, it may be caused by intense intercourse, placental abruption, pre-eclampsia, cervical degeneration and other factors, so it is important to seek medical attention to check the embryo situation and treat the cause after clarifying the cause. Common causes and treatments: 1. Intense intercourse: If the action is too rough during intercourse, stimulating uterine contraction or causing vulvar injury, it may cause bleeding. Therefore, it is necessary to pay attention to the strength and frequency of sexual life in the middle of pregnancy to avoid stimulating the fetus to affect its growth and development, and the symptoms can be gradually relieved after moderate rest; 2, placental abruption: due to the low position of the placenta, the stimulation of intercourse can easily cause placental abruption, which is manifested as a small amount of vaginal bleeding and irregular abdominal pain, and the condition of the fetus needs to be clarified through ultrasound examination in time, such as good fetal development can be promoted through glucocorticoids If the fetus is developing well, glucocorticoids can be used to promote the maturation of fetal lung to prolong the pregnancy; 3. Pre-eclampsia: If bleeding occurs after intercourse, accompanied by stomach pain or a feeling of tightness and hardness of the stomach, consider the possibility of pre-eclampsia, go to the hospital for fetal preservation treatment in time, and terminate the pregnancy if miscarriage is inevitable; 4. The treatment can be done by surgical excision. Note: Sexual intercourse is absolutely forbidden in the first and second trimesters of pregnancy, as it may cause miscarriage or intrauterine infection. Before having sex in the middle of pregnancy, the couple must do a good job of cleaning the vulva and male genitalia to avoid bacterial invasion and infection; gentle movements and not too many times to avoid causing uterine contractions resulting in miscarriage. If you have bleeding during intercourse during pregnancy, stop having sex immediately, observe the vaginal bleeding and abdominal pain, and go to the hospital in time. Pay attention to good hygiene habits, regular work and rest, and improve body resistance.