It is circular and cylindrical in shape and it attaches through the upper anterior portion of the vaginal wall.
Only 1/2 is visible in the vaginal region when viewed during a medical examination.
- The Cervix opens to allow sperm to pass into the uterus.
- During orgasm, the Cervix convulses and the External Os dilates.
- The Cervix opens to allow menstrual fluid to pass through
- The Endometrium during the menstrual period is shed.
- The Cervix opens and this is believed to be the cramping pain that many women experience.
- The Cervix dilates and opens to allow an infant to pass from the Uterus during Childbirth.
- The Cervix will dilate to 10 cm.
Anatomy of the Cervix
- Also called the portio vaginalis
- This portion is found in the vagina
2.) External os
- This is the circular opening of the Ectocervix
- The shape of the opening will change on age [minor] and previous vaginal birth [major]
3.) Endocervical canal
- Passageway between the uterus and vagina
4.) Internal os
- This is the opening prior to entrance into the endocervical canal
- This mucus that blocks the external os during menstruation
- This blocks sperm from entering the uterus
- However, during ovulation “other” mucus is formed that allows sperm to be guided into uterus.
Medical Conditions that Affect the Cervix
- Cervical Effacement
- Bishop Score
- IUD or Intrauterine Device
- Cervical Polyps
- Dysplasia of Cervix
- Cervical Cancer