Brown discharge from the vagina without menstruation may or may not be pregnancy. It may be a symptom that appears before the onset of menstruation, because the endometrium peels off a small amount of menstrual flow, which turns brown when it is not eliminated in time in the uterine cavity, or it may be caused by eating cold food before menstruation. It may also be pregnancy, with pre-eclampsia or ectopic pregnancy, when you can go to the hospital for a blood HCG test or urine early pregnancy test to determine if you are pregnant. If you are pregnant, you should also have an ultrasound and a blood progesterone test. According to the test results, if you have a preterm miscarriage, you should be given progesterone or diprogesterone under the guidance of your doctor for timely treatment to preserve the pregnancy. In case of ectopic pregnancy, surgery or conservative treatment should be done in time, so the appearance of brown discharge without menstruation should be highly alert.