The cause of cervical polyps is not completely understood, but they are frequently the result of infection. They may be associated with chronic inflammation, an abnormal local response to increased levels of estrogen, or local congestion of cervical blood vessels.
Cervical polyps are relatively common, especially in women over age 20 who have had children. Only a single polyp is present in most cases, but sometimes two or three are found. They are rare before menarche (onset of menstrual periods).
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