Bright red blood in early pregnancy may be due to preeclampsia, and may also be caused by cervical lesions. 1. Pre-eclampsia: after pregnancy progesterone level is relatively low or fatigue, exertion, the separation of embryonic tissue and uterine wall, there may be bright red blood, the patient will often have a small stomach swelling and pain and other symptoms, to the hospital found that the embryo is good, the need for bed rest, under the guidance of the doctor for fertility preservation treatments, such as oral progesterone and so on. 2. Cervical lesions: polyps on top of the cervix will cause bright red bleeding after intercourse or activity. The gynecological examination will be found in the hospital, you can be in the middle of pregnancy, cervical polyp removal surgery, because this time the fetus in the uterine cavity is more solid, the operation is not easy to abortion. Early pregnancy bright red blood may have other reasons, it is recommended that patients seek medical attention in a timely manner, improve the examination, a clear diagnosis, targeted treatment, so as not to delay the condition.