Normal cervical shape picture

The external opening of the cervix is ​​in the middle of the vagina. The normal posture of the uterus of an adult woman is a slightly extended and flexed position. "Tilt" refers to the angle between the short axis of the uterine body and the short axis of the vagina, and "flexion" refers to the angle between the short axis of the uterine body and the short axis of the cervix. So, what are the normal cervical shapes? Let's have a simple understanding of this issue. I hope the following points will be helpful to everyone!

The size of the cervix and the proportion of the uterine body vary with age and endocrine status. The cervical wall is composed of the mucosa, muscularis and adventitia.

1. The cervical canal mucosa is the cervical endometrium, which is covered with unilateral columnar epithelial cells that secrete mucus. The epithelial cells are sunken into glandular wrinkles in the original layer, commonly known as cervical glands, which can secrete mucus and become an important component of secretions.

2. There are reserve cells on the surface of the endometrium of the cervical canal and directly below the columnar epithelial cells of the glandular ducts and on the basement membrane. They have the dual division potential of proliferation and division into columnar squamous epithelial cells and metaplasia into squamous epithelium.

3. The area from the external cervical os to the internal vault of the vagina is covered with stratified squamous epithelium.

4. The junction area between the columnar epithelial cells of the cervical canal and the squamous epithelium of the vagina outside the cervix is ​​called the cervical epithelial transition zone or conversion zone. The location of the junction area between the two types of cells is not fixed and will move with the level of estrogen in the female body, age, endocrine system, vaginal pH and pathological conditions.

What are the normal shapes of the cervix? Generally speaking, the cervix of a woman who has not given birth is circular, while the cervix of a woman who has given birth is in the shape of a straight line.

The uterus of an adult is an inverted pear-shaped and can be divided into three parts: the uterine body, uterine fundus and cervix. The inner wall of the uterus is relatively narrow, with the upper end in the uterine body, called the uterine body, and the lower end in the cervix, called the cervical canal. The upper opening of the cervical canal connects to the uterine body, and the lower hole connects to the vagina, called the cervical opening. The cervical opening of a woman who has not given birth is ring-shaped with smooth and neat edges. After giving birth, the cervical opening becomes transversely fissured, which is what we often call a straight line.