Hi i found this for you hope it helps
If you notice a brownish tinge in your cervical mucus, relax; there is perhaps nothing to worry. Brownish tinge or discharge in cervical mucus is almost always old blood that did not leave the uterus during your last menstrual cycle. Sometimes a brown tinge can also be associated with ovulation. It might be related to a bleeding from a ruptured follicle. Occasionally when you see a brownish tinge in your cervical mucus, it can also be the result of trauma to the cervix. This could mean either an infection or something as simple as sexual intercourse.
Every once in a while, the brown discharge in cervical mucus can also be attributed to implantation, in which case you are pregnant. After ovulation a mature ovum, ready to be fertilized is released in the uterus. If this ovum encounters a good sperm and gets fertilized, it means the woman has conceived. When the fertilized ovum burrows into the uterine lining, some blood is often released and passed as brown discharge. Most women hardly notice it, but those who check mucus patterns are very aware of it.
So a brownish discharge in your cervical mucus could basically mean two things: either is because of ovulation or because of implantation. It is always a good idea to monitor your cervical mucus patterns. These are very useful when something like a brownish tinge appears in your discharges and you would like to track it down. Combined with basal body temperature monitoring, this can also be a great tool in predicting ovulation and planning pregnancies.