Sexual Health
Hidden natural defense lines in the female reproductive tract? Organizing Women's Private Knowledge
What is the natural defense line of the female reproductive tract? I believe everyone knows the important role of the reproductive tract in female friends. It is necessary for female friends to learn more about the reproductive tract. Let's provide a detailed introduction to the natural defense lines of the female reproductive tract.
There are two natural lines of defense in the female reproductive tract, one is the anatomical line of defense, which has five levels from the outside to the inside. The scope of cleaning the vagina for women usually involves the first and second levels. The first level is in the external genitalia, with the large labia on both sides naturally closing, covering the vaginal opening, making it difficult for the fine genitalia to enter. The second level is in the vagina. Due to the action of the pelvic floor muscles, the anterior and posterior walls of the vagina are close, and the vaginal opening is closed, which can prevent external pollution. If it is a postpartum woman, the vagina relaxes and defense function weakens.
The other is the physiological defense line. On the one hand, under the influence of estrogen, vaginal epithelial cells continuously metabolize, proliferate, and thicken, increasing their resistance to pathogens. On the other hand, under the action of vaginal bacteria, the glycogen rich in vaginal epithelial cells can be decomposed into lactic acid to maintain a normal acidic environment of the vagina and inhibit pathogens that adapt to weak alkaline environments, which is medically known as vaginal self purification. Therefore, although healthy women have some bacteria in their vagina, they usually do not cause inflammation.
Etiology of reproductive tract tumors
1. Chronic irritation:
Primary vaginal squamous cell carcinoma often occurs in the posterior cavity, which may be related to long-term use of uterine support, vaginal leukoplakia, or local inflammatory stimulation in patients with uterine prolapse.
2. Pelvic radiation therapy:
More than 20% of patients with primary vaginal cancer have a history of pelvic radiation therapy. It is generally believed that cervical cancer with poor vaginal cell structure or vaginal cancer can occur for 40 years after radiotherapy. The incidence rate of vaginal cancer in women under 40 years old undergoing pelvic radiotherapy is high.
3. Virus infection:
The initiating factors of vaginal malignant tumors, especially types 16 and 18, can be considered as human papillomas.
4. Immunosuppression:
The incidence rate of cancer is higher than that of patients with congenital or acquired and artificial immunosuppression. Vaginal cancer is no exception, and its incidence rate is higher than that of immunosuppressed patients.
5. Estrogen deficiency:
The common vaginal squamous cell carcinoma in elderly women may be related to low estrogen levels after menopause, leading to atrophy of the vaginal mucosal epithelium and creating favorable conditions for carcinogenic factors.