If you are pregnant and have bleeding after intercourse, you should consider a preterm miscarriage and need to go to the hospital for an ultrasound to check the development of the gestational sac. If it is in early pregnancy, you also need to take blood to check the HCG and progesterone values. If the gestational sac is well developed and there is only slight bleeding, you can use the appropriate amount of birth control medication to prevent miscarriage from occurring. If the bleeding is heavy and there is severe stomach pain, this condition is considered to be a refractory miscarriage and needs to be cleared. If the bleeding is not too heavy, you should also pay attention to bed rest, relax, do not have too much stress and avoid strenuous exercise during the process of fetal preservation. You also need to pay attention to a light diet and not to eat stimulating food to avoid stimulating the uterus to contract and increase the miscarriage.