The hymen is a membrane that surrounds or partially covers the opening of the external vagina. It is part of the vulva, or external genitalia, and has a structure similar to the vagina. The hymen does not seem to have a particular physiological function, but a virgin vagina can not be entered without passing through the hymen. In children, the general appearance of the hymen is crescent-shaped, although many forms are possible. Normal variations of the hymen range from thin and elastic to thick and slightly stiff; or maybe nothing at all.
The hymen may be torn or torn when the first time a woman engages in penetrative sex, which can cause temporary bleeding or slight discomfort, but different sources of how common tearing and bleeding are after the first sexual intercourse. The hymen can also stretch or tear as a result of various other behaviors; for example, he may be torn apart by illness, injury, medical examination, masturbation or physical exercise. For these reasons, the state of the hymen is not a conclusive virgin indicator, although it is continually considered in a particular culture. Although the hymen does not regenerate itself after tearing, the hymen can be recovered in a procedure called hymenorrhaphy.
Video Hymen
Development and histology
The genital tract develops during embryogenesis, from the third week of pregnancy to the second trimester, and the hymen is formed following the vagina. In the seventh week, a urorectal septum forms and separates the rectum from the urogenital sinus. By the ninth week, the MÃÆ'¼llerian ducts move downward to reach the urogenital sinus, forming a uterovaginal canal and entering into the urogenital sinus. On the twelfth week, the MÃÆ'¼llerian ducts converge to create a primitive uterovaginal channel called unaleria. By the fifth month, the normalization of the vagina is complete and the fetal hymen is formed from the proliferation of the synovaginal sphere (where the MÃÆ'¼llerian ductus meets the urogenital sinus), and usually becomes perforated before or soon after birth.
The hymen does not have neural innervation. In newborns, it is still under the influence of maternal hormones, the hymen is thick, pale pink, and excessive (doubled in on itself and probably prominent). For the first two to four years of life, babies produce hormones that continue this effect. The opening of their hymen tends to be annular (circumferential).
The last neonatal stage, the opening diameter of the hymen (measured in the hymenal ring) widens about 1 mm for each year of age. During puberty, estrogen causes the hymen to become very elastic.
The hymen can stretch or tear as a result of various behaviors, with tampons or the use of menstrual cups, pelvic examination with speculum, regular physical activity, sexual intercourse, insertion of multiple fingers or items into the vagina, and exercises such as gymnastics (performing 'split' ), or horseback riding. The remains of the hymen are called carunculae myrtiformes.
A 6 mm diameter plastic or plastic bar has a globe at one end with a diameter ranging from 10 to 25 mm, called the Glaister Keen rod, used for close examination of the hymen or breakage rate. In forensic medicine, it is recommended by the health authorities that a doctor should wipe near this area from a preteen girl avoiding the hymen and clearing the outside vulva vestibulum instead. In cases of alleged rape or child sexual abuse, a detailed examination of the hymen may be performed, but hymen conditions alone are often unconvincing.
Maps Hymen
Anatomical variations
Normal variations of the hymen range from thin and elastic to thick and slightly stiff; or maybe none at all. The imperforate hymen occurs in 1-2 of 1,000 infants. The only variation that may require medical intervention is the imperforate hymen, which actually prevents the flow of menstrual fluids or slows them significantly. In either case, surgical intervention may be necessary to allow menstrual fluid to pass or have sexual intercourse done altogether.
The prepubescent female prepuce hymns come in various forms, depending on the hormonal and activity levels, the most common being crescentic (posterior rim): no tissue at 12 o'clock position; sickle shaped crescent network from 1-2 hours to 10-11 hours, at most around 6 pm. Since puberty and so on, depending on estrogen levels and activity, the hymenal tissue may be thicker, and the opening is often fimbriated or irregularly shaped. In younger children, the torn hymen will usually heal very quickly. In adolescence, the opening of the hymen can naturally prolong and the variation in shape and appearance increases.
Variations of the female reproductive tract can result from agenesis or hypoplasia, defect canalization, lateral fusion and resorption failure, resulting in various complications.
- Imperforate: the opening of the himal is absent; will require minor surgery if it has not been repaired by puberty to allow menstrual fluid to escape.
- Cribriform, or microperforate: sometimes confused for imperforate, the opening of the hymen does not seem to exist, but it has, under a rigorous, small perforation check.
- Septate: the opening of the hymen has one or more tissues extending across the opening.
Cultural significance
The hymen is often linked to important cultural significance in a particular community because of its relationship to the virginity of a woman. In that culture, the whole hymen is greatly appreciated in marriage in the belief that this is proof of virginity. Some women undergo hymenorrhaphy to restore their hymen for this reason.
The hymen is often referred to as a "cherry". A common idiom for a woman who loses her virginity is "picking their cherries".
Rage of anger
In the 16th and 17th centuries, medical researchers saw the presence or absence of the hymen as evidence of a physical illness such as "uterine", ie, hysteria (female). If not healed, the uterus will, according to the doctor who practiced at the time, resulted in death.
Other animals
Because of the development of similar reproductive systems, many mammals have hymens, including chimpanzees, elephants, manatees, whales, horses and llamas.
See also
- Artificial hymen
References
External links
- Magical Cups and Bloody Brides - the historical context of virginity
- 20 Questions About Virginity - Interview with Hanne Blank, author of Virgin: The Untouched History . Discusses the relationship between the hymen and the concept of virginity.
- Placing tampons in painless radiation (US - ultrasound) from Hydrocolpos
- Evaluate Children for Sexual Harassment at American Family Doctors
- My Corona: Anatomy Previous Known as Hymen & amp; The Myths That Roved, sex education for the real world
- Hymen Myth
- Vaginal Corona
Source of the article : Wikipedia
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