Cervical mucus is produced by the mucous glands present in the cervix. Because the production of these glands is influenced by ovarian hormones, the characteristics of the mucus will change throughout the ovarian cycle. In addition to the hormonal variations of the cycle, cervical mucus can be an indicator that helps the patient and the gynecologist to know or suspect an abnormality.
Variations in its characteristics, such as odor and color, allow us to suspect colonization by different bacteria. Changes in cervical mucus to a brown, brown or dark color always indicate the presence of blood in small amounts.
When blood is present in the vagina, in small amounts, there is an interaction between the usual germs of this organ and the components of blood, mainly hemoglobin. As time goes by, the intense red color of the blood changes and becomes darker and darker.
The presence of a dark cervical mucus outside the episodes considered physiological should awaken in the woman the concern to consult her gynecologist to assess the need or not to study and the conduct to follow.