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Hymen

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(Redirected from Microperforate hymen)
This article is about the vaginal membrane. For other uses, see Hymen (disambiguation).

Hymen
Various hymen defects (the shaded areas represent the vaginal opening)
External genitals of a human female
Details
Identifiers
Latinhymen
Greekὑμήν
MeSHD006924
TA98A09.1.04.008
TA23530
FMA20005
Anatomical terminology

The hymen is a thin piece of mucosal tissue that surrounds or partially covers the vaginal introitus. A small percentage are born with hymens that are imperforate and completely obstruct the vaginal canal. It forms part of the vulva and is similar in structure to the vagina.[1][2] The term comes straight from the Greek, for 'membrane'.

In children, a common appearance of the hymen is crescent-shaped, although many shapes are possible. Each shape in the natural range has a Latinate name. During puberty, estrogen causes the hymen to change in appearance and become very elastic.[3][4] Normal variations of the post-pubertal hymen range from thin and stretchy to thick and somewhat rigid.[1] Very rarely, it may be completely absent.[5]

The hymen can rip or tear during first penetrative intercourse, which usually results in pain and, sometimes, mild temporary bleeding or spotting. Minor injuries to the hymen may heal on their own, and not require surgical intervention.[6] Historically, it was believed that first penetration was necessarily traumatic, but now sources differ on how common tearing or bleeding are as a result of first intercourse.[7][8][9] Therefore, the state of the hymen is not a reliable indicator of virginity,[2][10] though "virginity testing" remains a common practice in some cultures, sometimes accompanied by hymen reconstruction surgery to give the appearance of virginity.

Development and histology

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The genital tract develops during embryogenesis, from the third week of gestation to the second trimester, and the hymen is formed following the vagina. At week seven, the urorectal septum forms and separates the rectum from the urogenital sinus. At week nine, the Müllerian ducts move downwards to reach the urogenital sinus, forming the uterovaginal canal and inserting into the urogenital sinus. At week twelve, the Müllerian ducts fuse to create a primitive uterovaginal canal called unaleria. At month five, the vaginal canalization is complete and the fetal hymen is formed from the proliferation of the sinovaginal bulbs (where Müllerian ducts meet the urogenital sinus), and normally becomes perforate before or shortly after birth.[11]

The hymen has dense innervation. In newborn babies, still under the influence of the mother's hormones, the hymen is thick, pale pink, and redundant (folds in on itself and may protrude). For the first two to four years of life, the infant produces hormones that continue this effect.[12] Their hymenal opening tends to be annular (circumferential).[13]

Post neonatal stage, the diameter of the hymenal opening (measured within the hymenal ring) widens by approximately 1 mm for each year of age.[14] During puberty, estrogen causes the hymen to become very elastic and fimbriated.[3][4]

  • Arrows point to carunculae myrtiformes ("remnants") of the hymen in a post-pubertal individual.
    Arrows point to carunculae myrtiformes ("remnants") of the hymen in a post-pubertal individual.

The hymen can stretch or tear as a result of various behaviors, by the use of tampons[7] or menstrual cups, pelvic examinations with a speculum, or sexual intercourse.[1] Remnants of the hymen are called carunculae myrtiformes.[10]

A glass or plastic rod of 6 mm diameter having a globe on one end with varying diameter from 10 to 25 mm, called a Glaister Keen rod, is used for close examination of the hymen or the degree of its rupture. In forensic medicine, it is recommended by health authorities that a physician who must swab near this area of a prepubescent girl avoid the hymen and swab the outer vulval vestibule instead.[12] In cases of suspected rape or child sexual abuse, a detailed examination of the hymen may be performed, but the condition of the hymen alone is often inconclusive.[2]

Anatomic variations

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Normal variations of the hymen range from thin and stretchy to thick and somewhat rigid.[1][12] An imperforate hymen occurs in 1-2 out of 1,000 infants.[15][16] The only variation that may require medical intervention is the imperforate hymen, which either completely prevents the passage of menstrual fluid or slows it significantly. In either case, surgical intervention may be needed to allow menstrual fluid to pass or intercourse to take place at all.[17]

Prepubescent hymenal openings come in many shapes, depending on hormonal and activity level, the most common being crescentic (posterior rim): no tissue at the 12 o'clock position; crescent-shaped band of tissue from 1–2 to 10–11 o'clock, at its widest around 6 o'clock. From puberty onwards, depending on estrogen and activity levels, the hymenal tissue may be thicker, and the opening is often fimbriated or erratically shaped.[13] In younger children, a torn hymen will typically heal very quickly. In adolescents, the hymenal opening can naturally extend and variation in shape and appearance increases.[1]

Variations of the female reproductive tract can result from agenesis or hypoplasia, canalization defects, lateral fusion and failure of resorption, resulting in various complications.[18]

  • Imperforate: hymenal opening nonexistent; will require minor surgery if it has not corrected itself by puberty to allow menstrual fluids to escape.[19]
  • Cribriform, or microperforate: sometimes confused for imperforate, the hymenal opening appears to be nonexistent, but has, under close examination, small perforations.[20]
  • Septate: the hymenal opening has one or more bands of tissue extending across the opening.[21]

Trauma

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A hymen with a hymenal cleft visible on the left.

Historically, it was believed that first sexual intercourse was necessarily traumatic to the hymen and always resulted in the hymen being "broken" or torn, causing bleeding. However, research on women in Western populations has found that bleeding during first intercourse does not invariably occur.[8][9][22] In one cross-cultural study, slightly more than half of all women self-reported bleeding during first intercourse, with significantly different levels of pain and bleeding reported depending on their region of origin.[23][22] Not all women experience pain, and one study found a correlation between the experience of strong emotions – such as excitement, nervousness, or fear – with experiencing pain during first intercourse.[24]

In several studies of adolescent female rape victims, where patients were examined at a hospital following sexual assault, half or fewer of virgin victims had any injury to the hymen.[25][26][27] Tears of the hymen occurred in less than a quarter of cases.[27] However, virgins were significantly more likely to have injuries to the hymen than non-virgins.[25][27]

In a study of adolescents who had previously had consensual sex, approximately half showed evidence of trauma to the hymen.[28][29] Trauma to the hymen may also occur in adult non-virgins following consensual sex, although it is rare.[30] Trauma to the hymen may heal without any visible sign of injury.[25][29][1] An observational study of adolescent sexual assault victims found that majority of wounds to the hymen healed without any visible sign of injury having occurred.[31]

Trauma to the hymen is hypothesized to occur as a result of various other behaviors, such as tampon or menstrual cup use, pelvic examinations with a speculum, masturbation, gymnastics, or horseback riding, although the true prevalence of trauma as a result of these activities is unclear.[7][32][33]

Cultural and religious significance

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Further information: Virginity test

The hymen is often attributed important cultural significance in certain communities because of its association with a woman's virginity. In those cultures, an intact hymen is highly valued at marriage in the belief that this is a proof of virginity.[7][34][35] Some women undergo hymenorrhaphy to restore their hymen for this reason.[35] In October 2018, the UN Human Rights Council, UN Women and the World Health Organization (WHO) stated that virginity testing must end as "it is a painful, humiliating and traumatic practice, constituting violence against women".[36]

Some traditional Christian theological interpretations state that it is intended by God for the husband to be the one to break his wife's hymen, and that the bleeding the hymen, believed occur during first intercourse (but see above), is a blood covenant that seals the bond of holy matrimony between husband and wife (cf. consummation).[37]

Womb fury

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In the 16th and 17th centuries, medical researchers mistakenly saw the presence or absence of the hymen as founding evidence of physical diseases such as "womb-fury", i.e., (female) hysteria. If not cured, womb-fury would, according to doctors practicing at the time, result in death.[38][39]

Other animals

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Due to similar reproductive system development, many mammals have hymens, including chimpanzees, elephants, manatees, whales, horses and llamas.[40][41]

See also

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References

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  1. ^ a b c d e f Heger, Astrid H.; Emans, S. Jean, eds. (2000). Evaluation of the Sexually Abused Child: A Medical Textbook and Photographic Atlas (PDF) (2nd ed.). New York: Oxford University Press. pp. 61–65. ISBN 978-0-19-507425-3. Archived from the original (PDF) on July 8, 2018. Retrieved July 8, 2018.
  2. ^ a b c Perlman, Sally E.; Nakajyma, Steven T.; Hertweck, S. Paige (2004). Clinical protocols in pediatric and adolescent gynecology. Parthenon. p. 131. ISBN 978-1-84214-199-1.
  3. ^ a b Lahoti, Sheela L.; McClain, Natalie; Girardet, Rebecca; McNeese, Margaret; Cheung, Kim (March 1, 2001). "Evaluating the Child for Sexual Abuse". American Family Physician. 63 (5): 883–92. ISSN 0002-838X. PMID 11261865.
  4. ^ a b Heger, Astrid H.; Emans, S. Jean, eds. (2000). Evaluation of the Sexually Abused Child: A Medical Textbook and Photographic Atlas (PDF) (2nd ed.). New York: Oxford University Press. p. 122. ISBN 978-0-19-507425-3. Archived from the original (PDF) on July 8, 2018. Retrieved July 8, 2018.
  5. ^ Mishori, R.; Ferdowsian, H.; Naimer, K.; Volpellier, M.; McHale, T. (June 3, 2019). "The little tissue that couldn't – dispelling myths about the Hymen's role in determining sexual history and assault - Fact 1A". Reproductive Health. 16 (1): 74. doi:10.1186/s12978-019-0731-8. PMC 6547601. PMID 31159818.
  6. ^ Hegazy, Abdelmonem; Al-Rukban, Mohammed (January 1, 2012). "Hymen: Facts and conceptions". The Health. 3 (4). ISSN 2219-8083. Possible explanations for the lack of genital trauma include... acute injuries occur but heal completely.
  7. ^ a b c d "The Hymen". University of California, Santa Barbara. Retrieved September 19, 2020. While some females bleed the first time they have penetrative intercourse, not every female does. This depends on many factors, such as how much hymenal tissue a female has, whether her hymen has already been stretched or torn, or how thick and elastic it is.
  8. ^ a b Rogers, Deborah J; Stark, Margaret (August 8, 1998). "The hymen is not necessarily torn after sexual intercourse". BMJ: British Medical Journal. 317 (7155): 414. doi:10.1136/bmj.317.7155.414. ISSN 0959-8138. PMC 1113684. PMID 9694770.
  9. ^ a b Emma Curtis, Camille San Lazaro (February 27, 1999). "Appearance of the hymen in adolescents is not well documented". BMJ: British Medical Journal. 318 (7183): 605. doi:10.1136/bmj.318.7183.605. PMC 1115047. PMID 10037658. We agree with Rogers and Stark that so called rupture and bleeding of the hymen is not to be routinely expected after first sexual intercourse.
  10. ^ a b Knight, Bernard (1997). Simpson's Forensic Medicine (11th ed.). London: Arnold. p. 114. ISBN 978-0-7131-4452-9.
  11. ^ Healey, Andrew (2012). "Embryology of the female reproductive tract". In Mann, Gurdeep S.; Blair, Joanne C.; Garden, Anne S. (eds.). Imaging of Gynecological Disorders in Infants and Children. Medical Radiology. Springer. pp. 21–30. doi:10.1007/978-3-540-85602-3. ISBN 978-3-540-85602-3.
  12. ^ a b c McCann, J; Rosas, A. and Boos, S. (2003) "Child and adolescent sexual assaults (childhood sexual abuse)" in Payne-James, Jason; Busuttil, Anthony and Smock, William (eds). Forensic Medicine: Clinical and Pathological Aspects, Greenwich Medical Media: London, a)p.453, b)p.455 c)p.460. ISBN 978-1-84-110026-5
  13. ^ a b Heger, Astrid; Emans, S. Jean; Muram, David (2000). Evaluation of the Sexually Abused Child: A Medical Textbook and Photographic Atlas (Second ed.). Oxford University Press. p. 116. ISBN 978-0-19-507425-3.
  14. ^ Pugno, Perry (1999). "Genital Findings in Prepubertal Girls Evaluated for Sexual Abuse". CiteSeerX 10.1.1.522.1894.
  15. ^ Callahan, Tamara L.; Caughey, Aaron B. (2009). Blueprints Obstetrics and Gynecology. Lippincott Williams & Wilkins. ISBN 978-0-7817-8249-4.
  16. ^ Lardenoije, Céline; Aardenburg, Robert; Mertens, Helen (May 26, 2009). "Imperforate hymen: a cause of abdominal pain in female adolescents". BMJ Case Reports. 2009: bcr0820080722. doi:10.1136/bcr.08.2008.0722. ISSN 1757-790X. PMC 3029536. PMID 21686660.
  17. ^ "Imperforate hymen". medlineplus.gov. United States National Library of Medicine. 2021.
  18. ^ "Congenital Anomalies of the Hymen". brighamandwomens.org. Brigham and Women's Hospital.
  19. ^ "Imperforate Hymen". mountsinai.org. Mount Sinai Hospital (Brooklyn).
  20. ^ "Cribriform Hymen". texaschildrens.org. Texas Children's Hospital.
  21. ^ "Septate Hymen". childrenshospital.org. Boston Children's Hospital.
  22. ^ a b Loeber, Olga (2008). "Over het zwaard en de schede; bloedverlies en pijn bij de eerste coïtus Een onderzoek bij vrouwen uit diverse culturen" (PDF). Tijdschrift voor Seksuologie (in Dutch). Vol. 32. pp. 129–137. Archived from the original (PDF) on November 5, 2019. Retrieved September 7, 2018.
  23. ^ Amy, Jean-Jacques (January 2008). "Certificates of virginity and reconstruction of the hymen". The European Journal of Contraception & Reproductive Health Care. 13 (2): 111–113. doi:10.1080/13625180802106045. ISSN 1362-5187. PMID 18465471. S2CID 37484764.
  24. ^ Weis, David L. (1985). "The experience of pain during women's first sexual intercourse: Cultural mythology about female sexual initiation". Archives of Sexual Behavior. 14 (5): 421–438. doi:10.1007/BF01542003. PMID 4062539. S2CID 6427129.
  25. ^ a b c White C, McLean I (May 1, 2006). "Adolescent complainants of sexual assault; injury patterns in virgin and non-virgin groups". Journal of Clinical Forensic Medicine. 13 (4): 172–180. doi:10.1016/j.jcfm.2006.02.006. ISSN 1353-1131. PMID 16564196. Hymen injury was noted in 40 (50.6%) participants of the virgin group, but only 11 (12.4%) of the non-virgin group
  26. ^ Adams, Joyce A.; Girardin, Barbara; Faugno, Diana (May 2000). "Signs of genital trauma in adolescent rape victims examined acutely". Journal of Pediatric and Adolescent Gynecology. 13 (2): 88. doi:10.1016/S1083-3188(00)00015-2. ISSN 1083-3188. PMID 10869972.
  27. ^ a b c Adams, Joyce A.; Girardin, Barbara; Faugno, Diana (November 1, 2001). "Adolescent Sexual Assault: Documentation of Acute Injuries Using Photo-colposcopy". Journal of Pediatric and Adolescent Gynecology. 14 (4): 175–180. doi:10.1016/S1083-3188(01)00126-7. ISSN 1083-3188. PMID 11748013. The incidence of hymenal tears in self-described virgins was higher than in nonvirgins (19% vs. 3%, P .008);
  28. ^ Adams, Joyce A.; Botash, Ann S.; Kellogg, Nancy (March 2004). "Differences in hymenal morphology between adolescent girls with and without a history of consensual sexual intercourse". Archives of Pediatrics & Adolescent Medicine. 158 (3): 280–285. doi:10.1001/archpedi.158.3.280. ISSN 1072-4710. PMID 14993089. Subjects who admitted having past intercourse still had non disrupted, intact hymens in 52% of cases.
  29. ^ a b "New York Times Is Wrong about Hymens--But They Are Not Alone". Psychology Today. Retrieved September 8, 2018.
  30. ^ Slaughter, Laura; Brown, Carl R.V.; Crowley, Sharon; Peck, Roxy (March 1997). "Patterns of genital injury in female sexual assault victims". American Journal of Obstetrics and Gynecology. 176 (3): 609–616. doi:10.1016/s0002-9378(97)70556-8. ISSN 0002-9378. PMID 9077615.
  31. ^ Reading, Richard (December 12, 2007). "Healing of hymenal injuries in prepubertal and adolescent girls: a descriptive study". Child: Care, Health and Development. 34 (1): 137–138. doi:10.1111/j.1365-2214.2007.00818_7.x. ISSN 0305-1862. Of the girls who sustained 'superficial', 'intermediate,' or 'deep' lacerations, 15 of 18 prepubertal girls had smooth and continuous appearing hymenal rims, whereas 24 of 41 adolescents' hymens had a normal, 'scalloped' appearance and 30 of 34 had no disruption of continuity on healing. The final 'width' of a hymenal rim was dependent on the initial depth of the laceration. No scar tissue formation was observed in either group of girls.
  32. ^ Goodyear-Smith, Felicity A.; Laidlaw, Tannis M. (June 8, 1998). "Can tampon use cause hymen changes in girls who have not had sexual intercourse? A review of the literature". Forensic Science International. 94 (1–2): 147–153. doi:10.1016/S0379-0738(98)00053-X. ISSN 0379-0738. PMID 9670493.
  33. ^ Emans, S.Jean; Woods, Elizabeth R.; Allred, Elizabeth N.; Grace, Estherann (July 1, 1994). "Hymenal findings in adolescent women: Impact of tampon use and consensual sexual activity". The Journal of Pediatrics. 125 (1): 153–160. doi:10.1016/S0022-3476(94)70144-X. ISSN 0022-3476. PMID 8021768. Contrary to the popular belief that transections of the hymen are associated with gymnastics, horseback riding, and other vigorous sports, we found no relation between sports or gymnastics and hymenal changes. There was also no relation to prior gynecologic examination.
  34. ^ "Muslim women in France regain virginity in clinics". Reuters. April 30, 2007. 'Many of my patients are caught between two worlds,' said Abecassis. They have had sex already but are expected to be virgins at marriage according to a custom that he called 'cultural and traditional, with enormous family pressure'.
  35. ^ a b Sciolino, Elaine; Mekhennet, Souad (June 11, 2008). "In Europe, Debate Over Islam and Virginity". The New York Times. Retrieved June 13, 2008. 'In my culture, not to be a virgin is to be dirt,' said the student, perched on a hospital bed as she awaited surgery on Thursday. 'Right now, virginity is more important to me than life.'
  36. ^ "United Nations agencies call for ban on virginity testing". World Health Organization. October 17, 2018. Retrieved October 22, 2018.
  37. ^ Gentry, Harold (January 21, 2021). Intimacy. WestBow Press. ISBN 978-1-6642-1232-9.
  38. ^ Berrios, GE; Rivière, L (2006). "Madness from the womb". History of Psychiatry. 17 (66 Pt 2): 223–35. doi:10.1177/0957154x06065699. PMID 17146991. S2CID 148179899.
  39. ^ The linkage between the hymen and social elements of control has been taken up in Marie Loughlin's book Hymeneutics: Interpreting Virginity on the Early Modern Stage published in 1997
  40. ^ Blank, Hanne (2007). Virgin: The Untouched History. Bloomsbury Publishing. p. 23. ISBN 978-1-59691-010-2. Retrieved November 9, 2013.
  41. ^ Blackledge, Catherine (2004). The Story of V. Rutgers University Press. ISBN 978-0-8135-3455-8. Hymens, or vaginal closure membranes or vaginal constrictions, as they are often referred to, are found in a number of mammals, including llamas, ...
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