Hymen: Facts and conceptions

Abstract

Background: In conservative cultures, the presence of hymen without rupture in a virgin girl represents an indication of female pride and honor. Accordingly, there are many crimes, committed due to wrong views and conceptions among young people in such societies. The current review aimed to highlight the anatomy of the hymen, in a trial to create a better understanding and to eliminate misconceptions about virginity.
Methods: Databases of PubMed, ScienceDirect, SpringerLink, Wiley Interscience and others were searched. The research papers are studied and discussed.
Results: The hymen is a thin mucous membrane, partially closing the vaginal orifice. It represents an embryological remnant, originating from the urogenital sinus. It varies greatly in shape. Its elasticity increases after puberty so that it may allow penile penetration without rupture and bleeding.
Conclusions: Hymen is not an accurate indication of virginity. Knowledge of the hymen anatomy and its abnormalities is essential to eliminate the misconceptions about it.

Full text

Hymen: facts and conceptions
Correspondence
Abdelmonem A. Hegazy
Department of Anatomy &
Embryology, Faculty of
Medicine, Zagazig University,
Egypt
E-mail:
ahegazy@zu.edu.eg
Keywords:
Hymen, Anatomy, Development,
Abnormalities, Virginity
Funding
None
Competing Interest
None declared.
Received: October 9, 2012
Accepted: December 14, 2012
Abstract
ISSN (print): 2218-3299
ISSN (online): 2219-8083
Review
109 | theHealth | Volume 3 | Issue 4
Hegazy AA1 ,2, Al-Rukban MO3
1Department of Anatomy & Embryology, Faculty of Medicine, Zagazig University, Egypt, 2Department of Anatomy
& Embryology, College of Medicine, Majmaah University, Kingdom of Saudi Arabia, 3Department of Family &
Community Medicine, College of Medicine, King Saud University, Kingdom of Saudi Arabia
Introduction
The hymen is a membrane, partially closing the
external vaginal opening. Until now, many
myths regarding its anatomy exist but are
based primarily on dogma and lack of scien-
tific knowledge.1 In conservative cultures, its
presence without rupture in a premarital girl
represents an indication of her pride and hon-
or. According to Arab customs, woman who is
not found to be virgin on her wedding night
will bring a great shame on her family. She
might be killed by her brothers, uncles or even
her father, thereby "cleansing the shame". Alt-
hough such murders are illegal, the perpetra-
tors escape prosecution because the tribal cus-
toms that underpin these actions are so strong.2
Also, the husband might kill his bride, if he
does not notice a bleeding as a result of deflo-
ration. In such cultures, the traditional proof of
virginity is the occurrence of bleeding from
ruptured hymen on wedding night. Therefore,
the ignorance about structure of the hymen can
lead to violence, such as 'honor killing' as well
as psychological problems including suicidal
feelings. Meanwhile, the physician’s testimony
about the appearance of the genitalia may be
one of the key factors which determine the
outcome of such cases.3 Therefore, the clinician
should be familiar with normal prepubertal
genital anatomy and hymenal configuration.4
The current review aimed to highlight anatomy
of the hymen for medical practitioners and to
eliminate misconceptions of some population
about virginity that might represent a matter of
life and death.
Methods
Databases of PubMed, ScienceDirect, Spring-
erLink, Wiley Interscience and others were
searched. Search included all the available
years. It was conducted between May 2011
and April 2012. The available research pa-
pers were studied and discussed. The contents
included the results, discussion and conclusion.
Results
General Overview
The hymen is named after the God of mar-
riage "Hymenaios" in classical Greek mytholo-
gy.5 The word "hymen" is usually synonymous
with virgin membrane. This concept has origi-
nated in Western cultures, since the medieval
era when chastity among women was ex-
pected.6 In modern times, adolescents who live
in countries with more liberal attitudes about
sexuality may change their views about the
hymen.7 The original concept is still predomi-
nant among people in Islamic culture. Sex be-
fore marriage is frowned upon by Muslims, but
generally approved by non-Muslims. Sex outs-
Background: In conservative cultures, the presence of hymen without rupture in a virgin girl
represents an indication of female pride and honor. Accordingly, there are many crimes,
committed due to wrong views and conceptions among young people in such societies. The current
review aimed to highlight the anatomy of the hymen, in a trial to create a better understanding
and to eliminate misconceptions about virginity.
Methods: Databases of PubMed, ScienceDirect, SpringerLink, Wiley Interscience and others
were searched. The research papers are studied and discussed.
Results: The hymen is a thin mucous membrane, partially closing the vaginal orifice. It represents
an embryological remnant, originating from the urogenital sinus. It varies greatly in shape. Its
elasticity increases after puberty so that it may allow penile penetration without rupture and
bleeding.
Conclusions: Hymen is not an accurate indication of virginity. Knowledge of the hymen
anatomy and its abnormalities is essential to eliminate the misconceptions about it.
theHealth 2012; 3(4): 109-115

110 | theHealth | Volume 3 | Issue 4
Hymen: facts and conceptions
ide marriage is haram (a sin) in Islam.8
Humans are unique members of the primate group, pos-
sessing sexual characteristics different from other hominoids
(apes).9 According to many sources, human female is the only
primate member to possess a hymen.10,11 However, Balke et
al reported the presence of membranous constriction (hymen)
with an orifice, less than 2 cm in diameter in nulliparous ele-
phants, that is not broken by mating, but only during birth.12
Also, abnormal occurrence of hymen was detected in Murrah
buffalo. It was considered to be a developmental anomaly
of the genital tract in cattle.13
Anatomy of the vulva
Vulva is the term given to the female external genitalia. Its
structure includes mons pubis, labia majora and labia minora
(Fig 1). Anteriorly, the labia minora form the prepuce and
split to enclose the clitoris. The vestibule is the area enclosed
by the labia minora and contains the urethral and vaginal
orifices.14 Bartholin’s glands (mucus-secreting glands) open
into the groove between the hymen and the posterior part of
the labia minora.15 Arterial supply of the vulva is derived
from superficial and deep external pudendal branches of the
femoral artery and the internal pudendal artery on each
side. Venous drainage occurs via external pudendal veins to
the long saphenous vein. Lymphatic drainage reaches super-
ficial inguinal nodes, then femoral nodes and eventually to
pelvic nodes. The sensory innervation is carried by the ili-
oinguinal nerve (L1), perineal nerve (S3) and the perineal
branch of the posterior cutaneous nerve of the thigh (S2).16
Variations of Hymenal Morphology
The hymen is a thin fold of mucous membrane situated just
within the vaginal orifice.16 It is perforated to allow the
egress of the menses. The aperture of the hymen ranges in
diameter from pinpoint to one that admits the tip of one or
even two fingers.17 The configuration of hymen differs dra-
matically from one female to another one.18 At birth, it is
commonly annular in shape, while the crescentic configuration
is most prevalent in children over age 3 years.19 Furthermore,
the redundancy of the hymen decreased in 75% of subjects
during this period.20 The adult hymen varies greatly in shape
and area. When stretched, it is annular and widest posterior-
ly. Sometimes it is semilunar, concave towards the mons pubis.
Occasionally it is cribriform (multiple small openings), septate
hymen (a residual band, usually in the anteroposterior diam-
eter) or fimbriated (or redundant) hymen (Fig 1).16, 21, 22 The
common hymenal configurations in some studies are summa-
rized in table 1.
Hymen size
Early attempts to clarify the normal size of hymen in a pre-
pubertal girl focused on the opening size. The size of the
transverse hymenal opening diameter was one of the most
frequently used indicators of sexual abuse. Despite the upper
normal limit of the normal diameter is not clearly established,
some studies suggested that a diameter greater than 4 mm is
too wide parameter, indicating sexual abuse children of all
ages.28,29 However, other studies showed an upper limit of 8
mm in the absence of sexual abuse.30 Confusions about the
normal values of hymenal opening diameters led other au-
thors to focus on the size of hymenal tissue, as an alternative
criterion of sexual abuse. Narrowing (or attenuation) of the
inferior hymenal rim is correlated with sexual abuse.31 The
amount of tissue present between the hymenal edge and
vestibule inferiorly at 6 o’clock, detected in non-abused girls
is at least 1.0 mm in width.32 However, some studies conclu-
Figure 1: Normal anatomy of vulva and variations in the hymenal appearance.
Cases (n) Age (m) M (annular/
concentric
Cresentric/
Posterior rim
Sleeve like/
small orifice
Fimbriated Septate
Berenson et al.23 468 nb 80 19 1
Al Herbish24 345 nb 60 4.9 22 12.5
Berenson and Grady25 135 36 39 61 2 1
93 60 23 77 2 1
80 84 18 82 3 1
61 108 10 90 3 1
Heger et al.26 147 63 53 29.2 14.9 2
Myhre et al.27 194 69 6.7 78.4 0.5
Table 1: Hyemenal configuration in previous studies
Data is mentioned as %.

theHealth | Volume 3 | Issue 4 | 111
Hymen: facts and conceptions
ed that hymenal measurements demonstrated a high degree
of overlapping between abused and non-abused girls.27,33
Furthermore, these values differ according to the child age,
type of hymen, position of the examination, state of relaxa-
tion and cooperation of the female.34
Histological structure
Hymen is composed mainly of elastic and collagenous con-
nective tissue, covered on its both surfaces by stratified squa-
mous epithelium, without any evidence of cornification. The
epithelium is thicker at the attached edge. Nerve fibers are
scarce, at the free margin of the hymen. No nerve cells and
fibers are present at the free edge of the hymen. There is no
trace of glandular or muscle element.35 Hymen is relatively
an avascular membrane so it is unlikely to bleed significantly
even if it is torn.36
Age related changes
Despite, there is no significant difference in hymenal configu-
ration by race, a wide variations are noted by age.37 In the
newborn the hymen is vascular and the epithelium is thick.35 In
the prepubertal female, the lack of estrogen renders the
hymenal tissue thin and friable.22 Therefore, there is no dis-
tensibility prior to puberty.21 At puberty, it becomes thick and
redundant with a tendency of folding out.38 During adoles-
cence, circumferential hymenal elasticity increases.39 The ad-
olescent who has been sexually active may have a hymen
that does not show obvious trauma, or the hymen may have
old or new lacerations, extending down to the base.40 At
pregnancy, the epithelium of hymen becomes very thick and
very rich in glycogen.4 After childbirth, nothing is left but few
tags termed carunculae myrtiformes.15 At menopause, the
epithelium becomes thin in response to estrogen depriva-
tion.4
Development of Hymen
It is important to have a good grasp of embryology of the
hymen to understand its nature and common anomalies that
may ensue. Although the sex of the developing embryo is
determined at the time of fertilization, external genitalia are
the same till the 7th week of embryological development.41
The genital ducts develop from two pairs of ducts; mullerian
and wollfian ducts (Fig 2). The mullerian duct arises as a lon-
gitudinal invagination of the epithelium on the anterolateral
surface of the urogenital ridge. Cranially, the duct opens into
the abdominal cavity. Caudally, it passes lateral to wollfian
duct, then crosses it ventrally to grow caudomedially in close
contact with the opposite duct. The two adjacent parts of the
ducts fuse together forming the uterine canal. The caudal tip
of this canal forms a bulge into the posterior wall of urogeni-
tal sinus, forming mullerian tubercle.42 The fate of these ducts
depends upon the genetic sex of the embryo. In XX individu-
als, the mullerian ducts develop into a uterus, fallopian tubes
and vagina.43 Vagina develops from two sources; the caudal
part of uterine canal as well as solid vaginal plate, prolifer-
ating from the sinovaginal bulbs at the tip of fused mullerian
ducts.42 Later, central canalization of the vaginal plate oc-
curs, leaving the peripheral cells that form the epithelium of
the vagina. Until late in the female's fetal life, the lumen of
the vagina is separated from the cavity of the urogenital
sinus by the hymen (Fig 3). During the perinatal period, it
ruptures and remains as a thin fold of mucous membrane just
within the vaginal orifice.41
Abnormalities of the Hymen
a. Hymenal polyps and tags
Hymenal polyps and tags are elongated projection of hy-
menal tissue protruding beyond the hymenal rim or extending
from the rim itself.20 They are common after birth. They are
usually very small (less than 5 mm). Most resolve spontane-
ously and they are rarely seen after the age of 3 years.
Very rarely they can persist and become more polypoid.43
Although the etiology of this congenital feature is unknown, its
frequent occurrence in the midline at birth has led to sugges-
tion that these projections originate from septate hymens that
cleave in utero or shortly after birth.44
b. Hymenal ridges and bands
This congenital feature might be observed on the external or
internal surface of the hymen. External ridges may be found,
inferiorly at 6 o’clock or superiorly at 12 o’clock, immediate-
ly under the urethra. They occur in up to 86% of newborn
females.23 As the hymen becomes less redundant with aging,
external ridges tend to resolve and can be observed by 3
years of age in only 7% of children who had this finding at
birth.19 Internal ridges extend longitudinally from the hymen
into the vagina. They may observed on the all four quadrants
of hymen.23
c. Hymenal notches
An angular or V-shaped indentation on the edge of the hy-
menal membrane is defined as a notch. Superior and lateral
notches have been observed in 35% of newborn girls.23 Their
frequency decreases with age as superior notches widen to
form crescentic hymens, or as superficial notches disappear
Figure 2: Development of female genital ducts (coronal sections). Figure 3: Development of vagina and uterus (sagittal sections).

112 | theHealth | Volume 3 | Issue 4
Hymen: facts and conceptions
as the hymen becomes less redundant.44, 45 A notch extending
to the junction of the hymen and vestibule in any location has
been shown only in victims of abuse or trauma and should not
be considered as a congenital finding.20
d. Imperforate Hymen
It has been reported to occur in up to 0.1% of female new-
borns.46, 47 Imperforate hymen occurs mostly in a sporadic
manner, although rare familial cases do occur.47 It may be
detected in the neonatal period, less commonly in childhood
or, more typically, at adolescence when the girl presents with
cryptomenorrhoea and haematocolpos.48 Treatment is gener-
ally aimed to form a patent outflow tract. The traditional
treatment is surgical hymenectomy with T, X, plus, or cruciform
incisions and removal of excess hymenal tissue.49 It is a simple
procedure and yields good results. However, it may result in
social problems for some girls, due to destruction of the hy-
men that represents a symbol of virginity in some cultures.
There is another technique using the Foley catheter that rep-
resents an adequate alternative when preservation of the
hymen is required.50, 51 Basaran et al stated that the imperfo-
rate hymen is somewhat thicker than the borders of the nor-
mal hymen.52 Therefore simple incision and sutures will even-
tually forms a thick posterior rim of hymenal tissue suitable
for defloration during sexual intercourse. Although, conserva-
tive surgery with simple incision and sutures might be an al-
ternative option to standard treatment, the follow-up is nec-
essary to exclude occurrence of re-closure of the hymen.53
e. Microperforate Hymen
Microperforate hymen is a rare congenital condition consist-
ing of a tiny hymeneal orifice with normal female genitals.54,
55 The microperforation is quite difficult to visualize.54 Donato
et al reported a case of microperforate hymen in which di-
agnosis and treatment was performed after decades of ure-
thral coitus.55
Function of the Hymen
The hymen has no known biological function and its rupture is
of no medical consequences.5 However, its psychological and
cultural significance as a sign of virginity has been enormous.
In many societies, virginity of wives with intact hymen is high-
ly desired and even demanded. A second hypothesis, sug-
gests that the hymen is functioning in protection of the vaginal
area from contamination by fecal and other materials, espe-
cially at the early stage of life.9
Rupture of the Hymen
The hymen may be ruptured by sexual intercourse. The rup-
ture appears as irregular hymenal edges and narrow rims at
the point of the injury. Later on, the jagged angular margins
appear to be smoothed off.56 However, deeper penetrating
injuries of the hymen may lead to defects in the integrity of
the hymen, situated posteriorly or posterolaterally.15 Despite
definitive evidence of sexual contact (pregnancy), Kellogg et
al noticed only 2 of 36 examined adolescents having genital
changes that were diagnostic of penetrating trauma.57 Possi-
ble explanations for the lack of genital trauma include: pene-
tration does not result in visible tissue damage, or acute inju-
ries occur but heal completely.58 Similarly, Onan et al report-
ed a case of spontaneous formation of imperforate hymen
during pregnancy in the absence of previous surgical proce-
dures.59 This might be attributed to glycogenated epithelium,
occurring in response to estrogen exposure at pregnancy.35,
59 In the prepubertal girl, because of the relative size of the
structures, penetration occurs through the hymenal tissue and
causes tearing. However, in the adolescent girl and adult
woman consensual penetration occurs into the orifice which
thus stretches, resulting in spreading and indeterminate dis-
ruption.60, 61 Many authors agreed that the so called rupture
and bleeding of the hymen is not to be routinely expected
after first coitus.60, 62-64 Other causes of hymenal rupture,
other than sexual intercourse include vaginal insertion of ob-
jects such as tampons and digits, vigorous sporting activities,
surgical procedures and falling on sharp objects.5, 65
Hymen reconstruction
Hymen reconstruction, also described as hymenoplasty or
hymenorrhaphy, has emerged as a procedure restoring the
ability of the hymen to bleed at sexual intercourse on the
wedding night. It is indicated in some communities to protect
women from violent reprisals.66 It is sometimes needed as
part of rape rehabilitation.5 Hymen reconstruction is a minor
operation, performed on the eve of the wedding.67 It is done
by approximating the free borders of the remnants, using
fine, absorbable sutures to achieve partial occlusion of the
introitus. If hymenal remnants are inadequate, a small flap of
vaginal mucosa is reflected from the posterior vaginal wall
and approximated to the anterior wall as a band across the
hymenal ring.68
Virginity and chastity
Virginity revolves around whether a female has ever had
sex. It has been noticed that the description “virgin” itself
shows women's subordination to men, since the French term
“virgine” is derived from Latin by combination of the words
“vir,” meaning “man,” and “genere,” meaning generated or
“created for”.69 The Jewish, Christian, Muslims faiths all at-
tach considerable importance to the premarital virginity.70 In
fact, virginity is a physiological state, indicated though not
conclusively by an intact hymen (since some may be suffi-
ciently elastic to allow sexual penetration), whereas chastity
is a status of moral virtue.5 The postpubertal hy-
men is elastic so that some prostitutes have been found to
have intact hymens.71 Therefore, the absence of any injury to
the hymen should not be used as a reason to negate the pos-
sibility that the adolescent has experienced vaginal penetra-
tion.61 Strengthening the norm of virginity or delaying sex
might be helpful to prevent HIV and other sexually transmit-
ted infections among young people in some rural settings
where access to information and condoms is limited.72
Virginity Testing
Extraordinary as it may seem in the 21st century, examinati-

theHealth | Volume 3 | Issue 4 | 113
Hymen: facts and conceptions
tion of young women to ascertain evidence of consenting sex-
ual activity remains a flourishing activity.73 If there is any
suspicion about virginity, young girls are forced to undergo
hymen examination against their will. This forced virginity
testing appears to be a factor in a significant number of sui-
cides of young Turkish women. Nurses and midwives are al-
ways being involved in this procedure.74 Virginity testing is
likely to be harmful for many girls, regardless of whether
they pass the test. This examination strips the girl of her dig-
nity. Some parents under societal pressure may coerce or
persuade their daughters to undergo the practice. To pre-
serve their virginity, girls sometimes will have anal sexual
intercourse. This carries more risk of HIV infection than vagi-
nal intercourse if the sexual partner is HIV-infected.75
Discussion
Misconceptions in regard to virginity may lead to many
avoidable social disasters in conservative cultures. The im-
portance of virginity in such cultures is not only a matter of
individual wishes or values, but it is rooted in traditions re-
garding the honor of the extended families of the bride and
groom. Virgin in Islamic cultures is defined as the girl who has
not married and never experienced penile penetration of the
vagina. Conceptions about the hymen and virginity carry
many wrong ideas. Despite knowing female menses, many
male youths especially in rural areas do not know that the
hymen is normally perforated for egress of that menses.
Moreover, the traditional proof of virginity is the occurrence
of bleeding as a result of defloration. On contrary to these
misconceptions, the post pubertal hymen is elastic so that it
may stretch to allow sexual penetration without tears and
bleeding.71
On the other hand, the postpubertal hymen is relatively a
bloodless membrane, so if it is torn, it mostly result in a slight
bleeding.36 This bleeding might be unnoticed by the husband
especially after ejaculation, where the color of blood be-
comes faint after its mixing with the seminal fluid. Factors that
may increase the likelihood of bleeding at that time are
forced sexual relations, lack of arousal or lubrication, vaginal
infection, genital malformation (e.g. imperforate hymen),
generalized bleeding disorder, or if the girl is at pre-
puberty.76 Contrary to the common popular belief, the hymen
is not a solid septum separating the vagina from the external
world, but rather an embryological thin mucous membrane
remnant. This misconception might lead to fixation of the
groom upon defloration that in conjunction with ignorance
about the anatomy of the hymen and female genitalia can
result in a traumatic wedding night, instead of the required
pleasure. Violent penile penetration leading to minor lacera-
tions of vaginal wall rather than that of hymen appears to be
responsible for “blood stained bed-sheets”.36 On the other
hand, tears are more likely to occur in cases prepubertal
assault than after puberty due to coverage of estrogen. Oth-
er factors might play a role in the occurrence of severe
bleeding in cases of children. These factors include the in-
creased vascularity and decreased elasticity of the prepu-
bertal hymen, as well as incongruous of genitalia size of the
adult male and prepubertal female. Moreover, the hymenal
tissue of prepubertal females is thin and friable, rendering it
to be easily torn.22 Therefore, marriage before puberty that
usually happened in some rural areas should be prohibited.
Some girls who denied past intercourse had complete clefts in
the posterior rim of the hymen.61, 62 This might be explained
by factors other than sexual intercourse that might lead to
hymenal tears. These factors include violent sports, falling on
sharp objects, use of tampons and surgical procedures.5, 65
Premarital girls in such societies must avoid such factors. They
can use pads for menses, instead of using tampons, until they
become sexually active after marriage. Also, it is imperative
that the examiner digitally explore the vaginal orifice before
any attempt to insert a speculum is made. In case of female
with intact hymen, the anterior wall of the rectum might be
the method of examining the pelvic organs instead of vaginal
examination.
In some societies, women who have had sexual relationships
before marriage, might request the hymen repair due to fear
of being divorced or even killed. According to Amy, there
are increasing demands from young women, mostly but not
exclusively of Muslim faith, to seek certificates of virginity for
them or to reconstruct their hymen before they marry in Eu-
rope.70 Through the creation of artificial virginity, she be-
comes pure again and her honor is regained.2 Although, it is
a simple procedure, many Muslim doctors refuse to perform
it. They consider such procedure as a fraud for her groom.
This is because the adultery or sexual relationship outside
marriage is strictly prohibited in Islam.
The hymen is perforated during embryonic life. Failure of this
process could result in imperforate hymen. These cases need
surgical hymenectomy to relieve the blockage, for egress of
menses. Follow-up after this surgery is necessary to exclude
occurrence of re-closure of the hymen. Also, it should be done
under great care and asepsis as the closed vagina lacks its
protecting Doederlein’s bacilli and the pH is alkaline or
weakly acidic, so there is poor natural resistance to bacteria
entering from below and the blood and debris provide a
good culture medium.77 Imperforate hymen is considered
another cause for loss of the hymen, without experience of
sexual intercourse.
The integrity of the hymen is not easily assessed. This is at-
tributed to the wide varieties of its shape. Also, there are
many congenital features that might mislead with the sexual
assault. Hymenal notches or bumps are often present in the
normal child and should not prompt evaluation of sexual
abuse without associated history or parental concern. The
exception to this is the finding of notches in the inferior por-
tion of the hymen from 5 to 7 o'clock, which should prompt
screening for sexual abuse.45 If virginity testing is inevitable,
it should be done by experienced medical professionals e.g.
gynecologists or forensic physicians to avoid the danger of
over-interpreting small anatomic findings that may lie within
the range of normal variations. Many authors showed that
measurement of the hymenal diameter has no association

114 | theHealth | Volume 3 | Issue 4
Hymen: facts and conceptions
with sexual abuse.25, 27, 44 Furthermore, it is generally accept-
ed that the hymen is a poor indicator of penetrative sexual
activity in postpubertal girls.57, 61, 62 Given these facts, it is
obvious that hymenal bleeding on the wedding night might
not be a sign of virginity or even chastity. On the other hand,
if a girl does not bleed at the first experience of sexual in-
tercourse, it does not mean that she has lost her virginity be-
fore. Therefore, promoting the concept of bleeding on the
wedding night as a sign of virginity is nothing but
perpetuation of myth. Health education for youths is recom-
mended to eliminate such myths and wrong views about the
hymen and virginity.
Conclusion
The hymen is a thin embryological remnant, partially closing
the vaginal orifice. It is not an accurate indication of virginity.
It may be ruptured by sexual intercourse. However, some
hymens are elastic, allowing vaginal intercourse without be-
ing injured. At the same time, it may be broken accidentally
by tampon use or vigorous exercise.
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