The average vaginal depth, according to an article in the International Journal of Obstetrics and Gynecology is 3.77 inches (9.6 cm). The vagina's depth (from the opening to the tip of the cervix) can ...

Patients with cervical insufficiency typically present with a history of 1 or more lost pregnancies characterized by early cervical dilation. Cervical insufficiency (CI), also known as incompetent ...