If a pregnant woman finds brown discharge in her underwear in early pregnancy, consider the following reasons: 1, is low progesterone, progesterone in early pregnancy is a more important hormone, if progesterone is low will increase the risk of miscarriage, and fetal abortion, brown discharge and pre-eclampsia related. 2, if the pregnant woman in early pregnancy rest is not good, unstable state, and embryo quality is not good, there will also be bleeding. 3, if the pregnant woman in early pregnancy rest is not good, the state is not stable, and embryo quality is not good, there will also be bleeding. , if strenuous exercise is performed in early pregnancy, or if sexual intercourse is performed, it can also lead to the situation of pre-eclampsia miscarriage. Regardless of the cause, you need to actively protect the fetus and take a good rest at the same time.