Brown discharge at 21 weeks may be caused by preeclampsia, placenta hypoplasia, and gynecological diseases.
1. Pre-eclampsia: 21 weeks of pregnancy due to luteal insufficiency, maternal viral infections, long-term exposure to radiation and other reasons may cause pre-eclampsia of the fetus, there will be brown discharge performance.
2. Placenta position is low: 21 weeks pregnant placenta bed position is relatively low, with the increase in pregnancy weeks, women’s cervical opening will expand, attached to the lower uterine segment and the cervical opening of the placenta anterior wall part of the uterus and the cervical opening can not correspondingly grow, and separation of its attachment will result in the rupture of the sinus, and then there is a performance of the brown secretion.
3. Gynecological diseases: 21 weeks pregnant with vaginitis, endocervical polyps and other diseases, there may also be brown discharge. For example, in patients with vaginitis, the inflammation causes congestion of the vaginal walls, which may trigger a small amount of bleeding.
Brown discharge in 21 weeks of pregnancy should be considered abnormal, and it is recommended to consult a doctor in time for a clear diagnosis and treatment.