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In mammals and other animals, the vagina is the elastic, muscular reproductive organ of the female genital tract. In humans, it extends from the vestibule to the cervix. The outer vaginal opening is normally partly covered by a thin layer of mucosal tissue called the hymen. At the deep end, the cervix bulges into the vagina. The vagina allows for copulation and birth. It also channels menstrual flow, which occurs in humans and closely related primates as part of the menstrual cycle.
The hymen is a thin piece of mucosal tissue that surrounds or partially covers the vaginal opening. 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. The term comes straight from the Greek, for 'membrane'.
Virginity is the state of a person who has never engaged in sexual intercourse. The term virgin originally only referred to sexually inexperienced women, but has evolved to encompass a range of definitions, as found in traditional, modern and ethical concepts. Heterosexual individuals may or may not consider loss of virginity to occur only through penile-vaginal penetration, while people of other sexual orientations often include oral sex, anal sex, or manual sex in their definitions of losing one's virginity.
Rectal tenesmus is a feeling of incomplete defecation. It is the sensation of inability or difficulty to empty the bowel at defecation, even if the bowel contents have already been evacuated. Tenesmus indicates the feeling of a residue, and is not always correlated with the actual presence of residual fecal matter in the rectum. It is frequently painful and may be accompanied by involuntary straining and other gastrointestinal symptoms. Tenesmus has both a nociceptive and a neuropathic component.
Cryptomenorrhea or cryptomenorrhoea, is a medical condition in which menstrual bleeding occurs but remains hidden due to a congenital septum or atresia blocking the vagina, resulting in symptoms of menstruation without external bleeding. It is commonly seen in cases of imperforate hymen. Specifically the endometrium is shed, but a congenital obstruction such as a vaginal septum or on part of the hymen retains the menstrual flow. A patient with cryptomenorrhea will appear to have amenorrhea but will experience cyclic menstrual pain. The condition is surgically correctable.
An imperforate hymen is a congenital disorder where a hymen without an opening completely obstructs the vagina. It is caused by a failure of the hymen to perforate during fetal development. It is most often diagnosed in adolescent girls when menstrual blood accumulates in the vagina and sometimes also in the uterus. It is treated by surgical incision of the hymen.
Vaginal atresia is a condition in which the vagina is abnormally closed or absent. The main causes can either be complete vaginal hypoplasia, or a vaginal obstruction, often caused by an imperforate hymen or, less commonly, a transverse vaginal septum. It results in uterovaginal outflow tract obstruction. This condition does not usually occur by itself within an individual, but coupled with other developmental disorders within the female. The disorders that are usually coupled with a female who has vaginal atresia are Mayer-Rokitansky-Küster-Hauser syndrome, Bardet-Biedl syndrome, or Fraser syndrome. One out of every 5,000 women have this abnormality.
Reproductive medicine is a branch of medicine concerning the male and female reproductive systems. It encompasses a variety of reproductive conditions, their prevention and assessment, as well as their subsequent treatment and prognosis.
Hymenorrhaphy or hymen reconstruction surgery is the temporary surgical restoration of the hymen. The term comes from the Greek words hymen meaning "membrane", and raphḗ meaning "suture". It is also known as hymenoplasty, although strictly this term would also include hymenotomy.
Hematocolpos is a medical condition in which the vagina is pooled with menstrual blood due to multiple factors leading to the blockage of menstrual blood flow. The medical definition of hematocolpos is 'an accumulation of blood within the vagina'. It is often caused by the combination of menstruation with an imperforate hymen. It is sometimes seen in Robinow syndrome, uterus didelphys, or other vaginal anomalies.
Hydrocolpos is the distension of the vagina caused by accumulation of fluid due to congenital vaginal obstruction. The obstruction is often caused by an imperforate hymen or less commonly a transverse vaginal septum. The fluid consists of cervical and endometrial mucus or in rare instances urine accumulated through a vesicovaginal fistula proximal to the obstruction. In some cases, it is associated with Bardet-Biedl Syndrome. If it occurs in prepubertal girls, it may show up as abdominal swelling. It may be detected by using ultrasound. Prenatal diagnosis and early newborn imaging studies leads to early detection and treatment of these cases. It may also present at birth as a distended lower abdomen and vagina. It also associated with vaginal atresia. A high index of suspicion for hydrocolpos in a newborn presenting with fetal diagnosis of infraumbilical abdominal mass will facilitate timely intervention and prevention of complications.
Vaginal hypoplasia is the underdevelopment or incomplete development of the vagina. It is a birth defect or congenital abnormality of the female genitourinary system.
Hematometra is a medical condition involving collection or retention of blood in the uterus. It is most commonly caused by an imperforate hymen or a transverse vaginal septum.
A virginity test is the pseudoscientific practice and process of determining whether a woman or girl is a virgin; i.e., to determine that she has never engaged in, or been subjected to, vaginal intercourse. The test typically involves a check for the presence of an intact hymen, typically on the flawed assumption that it can only be, and will always be torn as a result of vaginal intercourse. It has been practiced since ancient times but its recent use in the United Kingdom dates back to the 1970s. It is still legal for doctors in the United States to perform virginity tests.
A vaginal disease is a pathological condition that affects part or all of the vagina.
An artificial hymen is a type of prosthetic created for the purpose of simulating an intact human hymen, usually to fake virginity.
Tight hymenal ring is a disorder of the hymen, characterized by a rigid hymen and tight introitus, whether acquired or congenital. It excludes an imperforate hymen.
A vulvar disease is a particular abnormal, pathological condition that affects part or all of the vulva. Several pathologies are defined. Some can be prevented by vulvovaginal health maintenance.
Vaginal anomalies are abnormal structures that are formed during the prenatal development of the female reproductive system and are rare congenital defects that result in an abnormal or absent vagina.
References
- ↑ Hoffman, Barbara (2012). Williams gynecology, 2nd edition. New York: McGraw-Hill Medical. p. 65. ISBN 978-0071716727.
