There are several reasons for this phenomenon, such as gynecological diseases, vaginitis and cervicitis, which can cause blood in the leukorrhea during the 6th month of pregnancy. In severe cases, the leucorrhea may also have an odor, which requires routine examination of the leucorrhea and medication to determine the condition. If after strenuous exercise, there is also the possibility of haemorrhage, which can endanger the health of the fetus and the pregnant woman at any time. If you have a preterm miscarriage, you may also have symptoms of blood, with increased bleeding over time, accompanied by pain in the stomach, or a tight and hard stomach, which require timely examination and treatment.