Supravaginal portion of cervix

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The supravaginal portion of cervix is a part of the cervix, which is the lower, narrow part of the uterus in the female reproductive system. The cervix connects the uterus to the vagina and is divided into two main parts: the supravaginal portion and the vaginal portion.

Anatomy

The supravaginal portion of the cervix is located above the vagina and is not visible during a routine gynecological examination. It is situated between the internal os, which is the opening of the cervix into the uterus, and the external os, which opens into the vagina. The supravaginal portion is surrounded by the parametrium, a connective tissue that supports the cervix and the uterus.

Function

The primary function of the supravaginal portion of the cervix is to provide structural support to the uterus and to maintain the integrity of the cervical canal. It plays a crucial role during pregnancy by helping to keep the fetus within the uterus until labor begins. The cervix, including its supravaginal portion, also produces cervical mucus, which changes in consistency during the menstrual cycle to either facilitate or inhibit the passage of sperm.

Clinical Significance

The supravaginal portion of the cervix can be involved in various medical conditions, including cervical cancer, cervicitis, and cervical dysplasia. It is important in the staging of cervical cancer, as the extent of cancer spread to the supravaginal portion can influence treatment decisions and prognosis.

Related Structures

• Vaginal portion of cervix
• Cervical canal
• Internal os
• External os
• Parametrium
• Uterus
• Vagina

See Also

• Cervical cancer
• Cervicitis
• Cervical dysplasia
• Menstrual cycle
• Pregnancy