If you have pink bleeding when you strain your bowels at 12 weeks of pregnancy, consider preeclampsia, cervicitis, hemorrhoids and so on. 1. Pre-eclampsia: 12 weeks of pregnancy belongs to the early stage of pregnancy, if pre-eclampsia occurs due to embryonic factors, maternal factors, paternal factors or environmental factors, etc., the partial shedding of the embryo will lead to the rupture of the uterine blood vessels and the symptoms of bleeding, which is usually accompanied by paroxysmal abdominal pain. 2. Cervicitis: If you don’t pay attention to personal hygiene after pregnancy, pathogens can infect the cervix and cause cervicitis, stimulated by inflammation, the patient will experience increased secretions and abnormal vaginal bleeding. 3. hemorrhoids: 12 weeks pregnant, a hard stool with pink bleeding may also be bleeding in the anal area, the more common is hemorrhoids, after pregnancy, abdominal pressure increases, resulting in venous reflux obstacles, the formation of hemorrhoids, if the hemorrhoids themselves, but also easy to aggravate the hemorrhoids, hemorrhoids, the main symptom of the hemorrhoids is the blood. The main symptom of hemorrhoids is pink blood when you are 12 weeks pregnant, there may be other reasons, it is recommended to go to the hospital, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.