The leucorrhea of pregnancy is brown, representing vaginal bleeding, there are several situations: 1, it may be ectopic pregnancy, or bleeding caused by abnormal pregnancy such as gravida, ultrasound examination is needed to exclude the possibility of abnormal pregnancy. 2, if it is determined to be intrauterine pregnancy, the most common cause is pre-eclampsia, blood HCG can be tested to understand the growth and development of the embryo, if not doubled every other day, it may be If the embryo has stopped developing or the embryo is developing slowly, it is necessary to carry out the corresponding fetal preservation treatment. 3, it may be caused by gynecological diseases, such as cervicitis, cervical polyps, after pregnancy due to the effect of progesterone will make the cervical congestion, cervical polyps will often show repeated bleeding, if the infection is complicated by the need for surgical treatment.