If you find a pregnant woman pulling blood, there may be the following reasons: 1, it may be due to hemorrhoids, due to the increasing size of the fetus during pregnancy, resulting in increasing abdominal pressure, hemorrhoids may occur, or lead to the further aggravation of hemorrhoids, triggering hemorrhoids, the most common symptom, blood in the stool is usually a drip of blood after the stool, especially in the case of constipation is more prone to occur.2, pregnant women pulling blood, it may be due to inflammation of the intestinal tract, such as Ulcerative colitis, bacterial dysentery.3, pregnant women pulling blood, may be due to stress ulcers.4, pregnant women pulling blood, the possible cause is due to anal fissure, usually this situation at the time there is obvious constipation. If you find a pregnant woman pulling blood, it is recommended to go to the regular specialized hospital systematic examination, a clear diagnosis.