Check out the five major defensive functions of women's private parts

1. The labia majora and minora of the female vulva are aligned on both sides

Covering the vaginal opening and urethral opening like two doors.

2. The female pelvic floor has many muscle tissues

Under the action of these pelvic floor muscles, the vaginal opening is usually in a closed state, and the front and back walls of the vagina are tightly attached, thus resisting the invasion of external pathogenic factors. But for multiparous women, the vaginal walls are relatively loose and this function will be weakened.

3. Estrogen secreted by women's ovaries can promote the proliferation and thickening of vaginal epithelial cells, enhancing resistance to pathogens

In addition, the vaginal epithelial cells are rich in glycogen, and the vagina of normal women is home to a type of bacteria called vaginal Lactobacillus, which can break down these glycogens into monosaccharides and then into lactic acid, making the vaginal environment acidic and maintaining a pH value of 4.2 to 5. Those pathogens that grow well in alkaline environments will be inhibited, which is the self-cleaning function of the vagina.

4. Under the action of sex hormones secreted by the ovaries, the glands of the cervical mucosa can secrete alkaline mucus, forming a mucus plug that blocks the cervical canal.

Isolating the cervical canal from the external environment reduces the possibility of bacterial invasion. It has been reported that bacteria can be detected in the lower 1/3 of the cervical mucus plug, but no bacteria can be detected in the upper 2/3 of the mucus plug. This shows that cervical mucus plug plays an important role in preventing ascending bacterial infection. In addition, the internal os of the cervix is ​​usually in a closed state, which can also prevent the invasion of pathogens.

5. Cyclic changes in sex hormones secreted by the ovaries

The endometrium of women of childbearing age also undergoes periodic exfoliation, resulting in menstruation. With the exfoliation of the endometrium and the discharge of menstrual blood, pathogens that have invaded the uterine cavity also have the opportunity to be eliminated.