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The Billings Ovulation Method® chart of a 28-year-old woman showed several months of abnormal cycles, with excessive thick and sticky mucus and no obvious changing pattern suggestive of ovulation. In one cycle, she experienced fertile symptoms followed immediately by bleeding, then fertile symptoms again. Her Billings Ovulation Method® tutor referred her to her GP for investigation.

A small amount of blood in your cervical mucus may be harmless, caused by hormone fluctuations, or even the implantation of an embryo if you have conceived. But sometimes it may indicate cervical or uterine polyps, or fibroids. There are also a number of cancers of the reproductive system that can affect your patterns of cervical mucus and menstrual cycle. It's important to discuss with your doctor any spotting or blood in the mucus that is a change from your usual pattern, or changes in your normal menstrual flow.

"The cervix is a precision organ as complex as the eye."

The cervix lies between the vagina and the isthmus which leads to the body of the uterus. It is 25mm long and contains several hundred crypts (glands) lined by cells which, under hormonal and neural influence, manufacture mucus, which is released into the cervical canal.