The color of bleeding in 13 weeks of pregnancy is dark red is more serious, may be caused by preeclampsia, cervical polyps, placenta hypoplasia state, etc., may occur infection and other complications, need to be actively treated. 13 weeks pregnant when the vaginal flow of dark red discharge is abnormal, may be due to preeclampsia, cervical polyps, placenta hypoplasia state, etc., bleeding time is long, may occur in the uterine cavity infection and other serious complications, need to be guided by the doctor for ultrasound, gynecological examination, blood test, etc. to assist in the diagnosis, and active treatment. During the 13th week of pregnancy, you should pay attention to appropriate rest, not to carry out heavy physical labor and strenuous exercise, etc., and appropriately increase the dietary nutrition to meet the needs of the rapid growth of the fetus, and when there are symptoms such as vaginal flow of brownish discharge, abdominal pain, etc., you need to go to the hospital in a timely manner in order to find out the cause as soon as possible, and comply with the doctor’s instructions to actively deal with the problem.