What is the length of the cervix?

For women, the greatest harm to the body is gynecological diseases, especially problems with the uterus, which will have a certain impact on women's physical and mental health, and sometimes even lead to infertility to a large extent. Among them, the cervix, as a part of the female uterus, is often particularly prone to problems. However, due to our lack of understanding of the body structure, we often don’t know what the specific cervix is ​​like to be considered normal. Let’s take a look at what the length of the cervix is.

Length of cervix

The cervix is ​​located in the lower part of the uterus. It is approximately cone-shaped, 2.5 to 3 cm long, with the upper end connected to the uterine body and the lower end extending deep into the vagina. The vault at the top of the vagina divides the cervix into two parts: the part of the cervix that protrudes into the vagina is called the cervicovaginal part, and the part above the vaginal vault is called the upper cervicovaginal part. The center of the cervix is ​​a long, fusiform lumen that is slightly flattened front to back. Its upper end is connected to the uterine cavity through the internal cervical os, and its lower end opens to the vagina through the external cervical os. The cervical canal is between the internal and external openings. The external cervical os is round in nulliparous women and transversely fissured in women who have given birth through vaginal delivery.

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

Cervical function

The cervix protrudes into the vagina and contains glands that secrete a kind of mucus, namely cervical mucus. The properties and amount of this mucus, like the endometrium, are affected by ovarian function and show obvious cyclical changes. During ovulation, under the action of estrogen, the cervical mucus and cervical fluid become thinner, which is conducive to the passage of sperm. At the same time, sperm can also absorb nutrients from the cervical mucus, increase its vitality, and promote the combination of sperm and egg. After ovulation, under the action of progesterone, the cervical mucus decreases and becomes thicker, and a mucus plug may form in the cervical canal, separating the cervix from the outside world and producing a protective effect. At the same time, it is not conducive to the passage of sperm through the cervix.

⑴The cervix is ​​the first barrier for sperm to pass through. It secretes mucus. As the menstrual cycle changes, under the action of estrogen, the cervical mucus becomes very thin, which is conducive to the passage of sperm.

⑵The cervical canal is where sperm is stored. Its inner wall has many recesses and fissures, where sperm can be temporarily stored for 1 to 2 weeks, waiting to gain energy before entering the uterus.

⑶After pregnancy, the uterus continues to grow to accommodate the growth of the fetus. But the cervix remains closed, ensuring that the fetus grows safely inside it until the pregnancy is full term.

⑷ At full term, the cervix gradually softens and begins to expand during delivery, and the cervical opening opens from 0.5 cm to 10 cm, opening the first door for the smooth delivery of the fetus. Therefore, the cervix is ​​the only way for the delivery of the fetus.

⑸ Some people believe that the cervix is ​​also a sexually sensitive organ and has a certain relationship with sexual life

The above is an introduction to the length of the cervix. After understanding it, we have a better understanding of the common sense of the body structure, which makes it easier to discover and treat problems when they occur in the body. In fact, it is not difficult to have a healthy body. As long as you maintain good living habits and eating habits in your daily life, you can effectively reduce the occurrence of many diseases.