Brown discharge is not necessarily recognized as miscarriage. Pregnant women with brown discharge may be considered to be suffering from cervical erosion, because cervical erosion may cause the body to secrete brown substances, but this kind of disease will not affect the normal growth and development of the baby, so if the secretion of brown substances caused by cervical erosion, this situation usually does not lead to miscarriage of pregnant women. However, if a pregnant woman feels pain in the lower part of her abdomen or has a feeling of falling or bloating while secreting brown substances, and observes that the brown secretions are coming out from the cervical canal, she needs to go to the hospital for a timely examination. If the HCG index or progesterone index is relatively low, you need to pay special attention to this kind of brown discharge to consider the possibility of miscarriage, it is recommended that the pregnant woman to take active fertility preservation treatment program and bed rest, replenishment of the required nutrients, but at the same time should be ultrasound examination to rule out the possibility of ectopic pregnancy.