Basic Information
Chinese name: labia
Foreign name: labium labia
Nature: Female reproductive system
genus: external reproductive organs
Classification: labia majora, labia minora function to protect the internal genitalia
definition
The labia is a part of the female external genitalia, which includes the labia majora and the labia minora, which are like two "doors" to protect the vaginal opening and urethral opening from infection. During a woman's childhood, the two labia meet tightly with a slight gap in between. After puberty begins, pubic hair begins to grow on the outside of the labia majora, and the inside is smooth and moist.
After entering puberty, there will be slightly raised dots on the inner side of the labia, which are oil glands. These glands secrete oil to keep this area lubricated. Every woman's labia is not exactly the same. Most women's labia majora is larger than the labia minora, but there are exceptions. Some people's labia minora is larger than the labia, or the size of the two labia varies. This is normal. phenomenon, will not affect sexual life and reproductive function. Some people may be involved due to the protruding labia minora, causing discomfort in the genitals, and you should wear loose underwear as much as possible.
labia majora
The labia minora is located inside the labia majora and is also divided into two pieces. It is the second portal to protect the vagina and urethra. The labia minora are inconspicuous in childhood and begin to increase during puberty. The labia minora is smooth and moist inside and outside, and there are abundant nerve endings on it, which is one of the sensitive areas. When sexually excited, the labia minora are congested and swollen, and their volume can be increased by two to three times, which can increase the effective length of the vagina by more than one centimeter.
The labia majora are a pair of oblong raised skin folds on both sides of the vulva, near the inner sides of the two strands. The front is connected to the mons pubis, and the back is connected to the perineum; from the mons pubis, it stretches downward and backward. The front left and right labia majora join together to form an anterior joint at the mons pubis. The union is anterior to the anus. Pubic hair grows on the outside of the labia majora. Under the skin is thicker loose adipose tissue, elastic fibers and venous plexus, which are prone to hematoma after injury. The outer skin is pigmented and has pubic hair; the inner surface is pale pink, similar to mucous membranes, without pubic hair.
During a woman's childhood, the two labia majora meet tightly with a slight gap in between. After puberty begins, pubic hair begins to grow on the outside of the labia majora, and the inside is smooth and moist. After entering puberty, there will be slightly raised dots on the inner side of the labia, which are oil glands. These glands secrete oil to keep this area lubricated. The labia majora of adult unmarried women and obese women are naturally closed, covering the labia minora, vaginal opening and urethral opening. The labia majora of a multiparous woman are separated on both sides due to the effects of childbirth. The individual labia majora vary greatly, some are fat and thick, and some are small and thin.
The labia minora are a pair of elongated folds of skin and mucous membranes located between the labia majora on both sides. The labia minora are soft, without subcutaneous fat, rich in sebaceous glands and sweat glands, and the surface is moist, smooth and hairless. Submucosal nerve distribution is rich, so the feeling is very keen. The labia minora are thin and vary widely in size and shape from person to person. Some are not symmetrical, one side is big and the other is small, this is normal. In unmarried and married nulliparous women, the labia minora are closed and play a role in protecting the vagina and internal genitalia as part of a woman's natural defense function. The labia majora covers the labia minora, vaginal opening and urethral opening. When there is sexual desire, the labia majora opens, and its covering part exposes the surface, and even exposes the vaginal opening.
effect
The labia majora in women is equivalent to the scrotum in men. The labia majora on both sides of the vaginal opening has the Bartholin glands (equivalent to the male bulbourethral glands) buried deep within the labia majora. The Bartholin glands continuously secrete mucus to lubricate and clean the vagina and maintain the ecological balance in the vagina. The labia majora is the most loyal defender of the Bartholin gland. The birthplace of special smells. In the labia majora, there are the same special sweat glands as the armpits, which emit the same odor. This odor can attract and induce the opposite sex, and stimulate the sexual excitement of the opposite sex. The corpus cavernosum of the vestibular bulb is widespread under the fat of the labia majora, which can make the labia majora bulge like a leather ball. During intercourse, the labia majora becomes congested and inflated, becoming a spring pad for piston movement, which can push the penis into the vagina.
In addition, the swollen labia majora has the caressing effect of entraining and "clipping" the penis. In sexual life, if you put your palm on the inside of the labia majora, there will be a "tight grip" feeling. Therefore, the labia majora has an important role in improving the quality of sexual life and strengthening the relationship between husband and wife. In the eyes of ordinary people, the labia majora located in a woman's perineum is just two dispensable skin folds. Where is the effect at all? In fact, the labia majora is an indispensable part of the female external genitalia. In the early embryonic stage, male and female genitalia originate from the same "germ".
As the embryo develops, it is gradually divided into males and females, and the genitals appear gender differences. However, some structures and functions of the two are still very similar. A woman's clitoris is equivalent to a man's penis, and it can also be said to be a reduced penis. Both have rich nerve endings and are extremely sensitive to the stimulation of the opposite sex. The labia majora in women is equivalent to the scrotum in men. The male scrotum is the "faithful guard" of the testicles and plays a pivotal role in the production of sperm and male hormones by the testicles.
So, what is the function of the female labia majora? The "guardian" of the urinary and reproductive system. The labia majora covers the labia minora, the vaginal opening and the external opening of the urethra, preventing the invasion of external harmful substances and faithfully protecting the safety of the urinary and reproductive systems. There are Bartholin glands (equivalent to male urethral glands) buried deep in the labia majora on both sides of the vaginal opening. The Bartholin glands secrete mucus continuously to lubricate and clean the vagina and maintain the "ecological balance" in the vagina. The labia majora is the most loyal "guardian" of the Bartholin gland. In this sense, the labia majora not only protects the pelvic organs, but also maintains the health of the whole body. It is the "birthplace" of special smells. Research has shown that women's underarms emit a unique smell.
This odor can attract and induce the opposite sex, and stimulate the sexual excitement of the opposite sex. In the labia majora, there are the same special sweat glands as the armpits, which emit the same odor. Of course, the inducing effect of this special odor varies from person to person, both in terms of its own quantity and quality, and it is also related to the sensitivity of the opposite sex. Some men are very sensitive to this smell and have a tendency to "trigger", while others may be indifferent and nonchalant. It can be seen that the role of women's "scrotum" is more extensive and more important than that of men's scrotum. People should not regard the labia majora as a mark, let alone despise it, but should seriously cherish it, protect it, prevent it from being invaded by viruses, bacteria and various microorganisms, and keep it safe and secure for women. healthy.
The labia minora are soft, without subcutaneous fat, rich in sebaceous glands and sweat glands, and the surface is moist, smooth and hairless. Submucosal nerve distribution is rich, so the feeling is very keen. The labia minora are thin and vary widely in size and shape from person to person. Some are not symmetrical, one side is big and the other is small, this is normal. In unmarried and married women with last childbirth, the labia minora are closed and play a role in protecting the vagina and internal genitalia, which is part of a woman's natural defense function. The front of the labia minora merges with each other and is divided into two lobes, the anterior lobe wraps around the clitoris to form the clitoral foreskin, and the posterior lobe forms the clitoral frenulum. The posterior end of the labia minora merges with the posterior end of the labia majora, forming a fold in the midline, which is the labia frenulum, which is easy to tear during childbirth.
The labia minora is located on the inner side of the labia majora, and is also a skin fold. There is no pubic hair growth on it. There are blood vessels, elastic fibers and a small amount of smooth muscle under the skin, and there are rich nerve distribution, and the feeling is very sharp. There are great individual differences in the shape and size of the labia minora. Some people's labia minora are very narrow, and some people's labia minora are very long and hang down to the outside of the labia majora. Some are very thick, some are very thin, some are irregular umbrella-shaped; some are as large as a fingernail, with a typical semicircular shape. Some people are pale red; some are brown-red; some people even have two colors of labia minora, the outer side is brown-black, and the inner side is pink. In general, its color deepens with age and number of deliveries. Some African tribal women are proud of the length of their labia minora, so they pull it from childhood, so the labia minora in adulthood are thick and long, protruding high beyond the labia majora, but their size has no obvious effect on sexual response .
Color changes
Some people are pale red; some are brown-red; some people even have two colors of labia minora, the outer side is brown-black, and the inner side is pink. In general, its color deepens with age and number of deliveries.
Under normal conditions without stimulation, the labia majora on both sides of the nulliparous woman is naturally closed and closed at the midline, covering the adjacent structures such as the labia minora, urethral opening and vaginal opening, which has obvious protection for them. effect. The labia majora opens only when a woman is sexually aroused, exposing the covered area to the surface. Obstetric injury can disrupt the ability of the labia majora to lie against the midline, significantly affecting how they respond to effective stimuli.
In nulliparous women, the labia majora thins, flattens, and produces an upward-outward elevation or displacement (away from the perineum and vaginal opening) during arousal, which is completed in late arousal or early plateau. This may be caused by rapid hyperemia of the labia minora or by initial hyperemia of the outer third of the vagina. Another possibility is an involuntary neurophysiological effect to remove any external barriers to the intended process of sexual penetration. There are no obvious anatomical changes during orgasm. During the resolution phase, the labia majora return to normal thickness and midline position.
If the woman has experienced orgasm, the regression process will be very rapid; otherwise, the separated and swollen labia majora will take a long time to return to the midline position. If the excitement phase and plateau phase are delayed for a long time, the labia majora will be severely venous and swollen, and even edema may occur. Even after all sexual stimulation is completely stopped, it will continue for several hours to gradually subside.
For multiparous women, especially those with varicose veins, the labia majora responds in a different way, with marked dilation instead of displacement during the excitatory phase, and an occasional 2-3-fold increase in diameter during the prolonged plateau phase. For women afflicted by varicose veins who experience only a plateau, labial bleeding will persist for a 2-3 hour long resolution period, with orgasm resolving much more quickly. It can be speculated that the more severe the varicose veins of the labia majora, the more serious the vascular congestion during sexual tension will be.
The labia minora is located on the inner side of the labia majora, and is also a skin fold. There is no pubic hair growth on it. There are blood vessels, elastic fibers and a small amount of smooth muscle under the skin, and there are rich nerve distribution, and the feeling is very sharp. There are great individual differences in the shape and size of the labia minora. Some people's labia minora are very narrow, and some people's labia minora are very long and hang down to the outside of the labia majora. Some are very thick, some are very thin, some are irregular umbrella-shaped; some are as large as a fingernail, with a typical semicircular shape. Some people are pale red; some are brown-red; some people even have two colors of labia minora, the outer side is brown-black, and the inner side is pink. In general, its color deepens with age and number of deliveries.
Regardless of whether they are nulliparous or multiparous, after they enter the sexual arousal period, the labia minora will be congested and swollen, and their diameter will expand significantly, which can increase to 2-3 times when they reach the plateau. As the diameter increases, it protrudes from the protective labia majora barrier, which extends the effective length of the vaginal canal during intercourse by at least 1 cm and facilitates the opening of the vaginal opening. once increased in diameter, the labia minora are primed for their most unique female sexual physiology (change in color).
During the plateau phase, the labia minora of nearly all women have a distinct color reaction. In nulliparous women, it changes from pink to bright red and spreads around the vaginal opening, including the clitoral foreskin. The color of multiparous women changes from bright red to deep purplish red. As a rule, the darker the color change of the labia minora, the greater the degree of varicose veins in the pelvis and labia. Because the color change in the plateau phase is so special, the labia minora in a state of sexual response is called "sexual skin".
Premenopausal women who have reached plateau sexual tension levels and experience a change in "sex skin" color will experience an orgasm process. In order to support the above statement, it must be assumed that the specific form of effective sexual stimulation that causes sexual skin color changes persists without major changes (the sexual skin mentioned here refers specifically, not to the female monkeys, orangutans that are commonly said to be estroused. changes in skin color, etc. during the period). If orgasmic release is not achieved if effective sexual stimulation is withdrawn, the color change of the labia minora will also subside rapidly, much faster than the increase in the diameter of the labia caused by sexual tension.
Clearly, sexual skin can provide clinically satisfactory evidence for the level of sexual tension experienced by an individual, with changes in color proportional to the individual's response to specific sexual stimuli. It must be emphasized that the occurrence of sexual skin reactions is a clinical sign of imminent orgasmic manifestations. A prior sexual skin color change was demonstrated in all of the observed women who experienced orgasm release.
During the resolution phase, the labia minora color rapidly (within 10-15 seconds) fades from dark or bright red to light pink. The second phase of color loss (full return to unstimulated color) was also quick, but far less regular. During this persistent or secondary sexually intense color change experienced by sexual skin, inconsistency in resolution often results in a mottled appearance of the skin. When the labia minora has plateaued, its diameter will increase by at least 2 times, which will help the opening of the external vaginal orifice. Furthermore, sexual skin coloration not only predicts a strong level of female sexual tension, but is a clinical indicator of imminent orgasm while maintaining effective sexual stimulation.
difference between things
90% of East Asian women have their labia majora thickness of less than 10mm, with an average of only 7mm, while among white people in Europe and America, more than 60% of women have a labia thickness of more than 11mm, and the average thickness has reached 11mm. mm. This difference is not difficult to explain. Since the labia majora is a connective tissue dominated by fat, this difference in thickness can be said to be a difference in fat mass. Even if you are tall and have less fat, it will not be thick. A large number of surveys have shown that whites have the thickest labia majora, but they are more obese than blacks. However, this cannot be simply explained as the fatter, the thicker the labia. The length, thickness and height of the labia minora are also generally smaller in Asians. For example, the average length of the labia minora of East Asian women is 5 cm, while the average length of white people is 7 cm, and the difference in the height of the labia minora is more pronounced.
