Brown bleeding is the result of a small amount of blood staying in the uterine cavity for too long. Symptoms of bleeding during pregnancy are not normal regardless of the amount or color of the bleeding. The specific cause of brown bleeding during pregnancy is related to the week of pregnancy at the time of bleeding. Brown bleeding in early pregnancy is caused by a small amount of bleeding from the gestational sac, which flows out after a long stay in the uterine cavity . Insufficient level of progesterone secretion by the ovaries, inflammatory diseases of the endometrium, infection with specific pathogenic microorganisms in early pregnancy that affect the development of the embryo can cause symptoms caused by bleeding from the gestational sac. At this time, an ultrasound examination can reveal a small amount of dark areas of fluid around the gestational sac. If the brown bleeding is found in the middle or late stages of pregnancy, the most likely cause is a small amount of bleeding due to the low position of the placenta.