Women have brown secretion in pregnancy test, the specific reasons are as follows: First, may be due to the fertilized egg just transplanted to the uterine cavity when the foreign body rejection, so that a small part of the endometrium stripped, there will be brown secretion. Second, the embryo transplanted to the uterine cavity, the presence of uterine adhesions or uterine cavity submucosal fibroids, due to the embryo bed by the pressure, there will be endometrial stripping brown secretion. When there is brown discharge, you must go to the hospital to do gynecological ultrasound, blood test blood HCG, progesterone test. If the embryo development is in line with the gestational week, you can first give bed rest and birth control drugs for treatment, otherwise women often appear brown discharge, easy to lead to uterine infection or miscarriage occurs.