Women to menstrual flow of brown blood is not necessarily pregnant, based on this alone is not able to determine whether the pregnancy, if the woman has a normal sex life, and did not take contraception, it is possible to be pregnant, the initial symptom of pregnancy is the cessation of menstruation, generally only in the menstrual period postponed for a week to know whether it is pregnant. If the amount of brown blood during this period is not large, it may be the fertilized egg implantation bleeding, and menstrual bleeding is not the same, it is recommended that women go to the hospital to take blood tests, if the diagnosis of pregnancy, the vagina out of the amount of brown blood is easy to be the case of miscarriage, it is recommended to protect the fetus. Women in the premenstrual flow of brown blood, may also be menstrual disorders caused by early menstruation, or because of women’s emotional changes, environmental factors and other endocrine disorders, so that the color of the menstrual period into brown; there may be women suffering from gynecological inflammation or cervical lesions, can cause the color of the menstrual period is brown, it is recommended that the women observe a week after the gynecological examination in the hospital.