30 days pregnant with brown vaginal discharge, mainly suggests the following possibilities: 1, the possibility of preeclampsia, the patient if the corpus luteum insufficiency, endometrial tolerance is poor, or sperm and egg quality is not good and so on various conditions, there will be preeclampsia. Check the blood progesterone and HCG levels will be relatively low, or basically close to normal, according to the situation to protect the fetus. 2, to consider the possibility of ectopic pregnancy, ectopic pregnancy in the case of pregnancy sac activity is not good, so the patient is prone to bleed. 30 days pregnant through ultrasound can not observe the existence of the gestational sac, so there is no way to determine the ectopic pregnancy, only through the dynamic observation of progesterone HCG and ultrasound to determine. Once determined to be ectopic pregnancy, it must be timely according to the situation to deal with, you can choose conservative treatment, can also choose surgical treatment.3, to consider the patient after pregnancy combined with vaginal inflammation, or cervical inflammation caused by bleeding. This situation is often accompanied by increased vaginal discharge, local redness, swelling and discomfort, you need to do gynecological examination, leukorrhea test according to the situation to choose the drug treatment. 4, we should consider that the patient may have cervical polyps, or cervical lesions, vaginal lesions. Need to do gynecological internal examination, as well as other related auxiliary examination, and pathological examination to clarify the diagnosis.