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In mammals, the vagina is the elastic, muscular part 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 sexual intercourse and birth. It also channels menstrual flow, which occurs in humans and closely related primates as part of the menstrual cycle.
The terms genital modification and genital mutilation can refer to permanent or temporary changes to human sex organs. Some forms of genital alteration are performed on adults with their informed consent at their own behest, usually for aesthetic reasons or to enhance stimulation. However, other forms are performed on people who do not give informed consent, including infants or children. Any of these procedures may be considered modifications or mutilations in different cultural contexts and by different groups of people.
The hymen is a thin piece of mucosal tissue that surrounds or partially covers the external vaginal opening. It forms part of the vulva, or external genitalia, and is similar in structure to the vagina.
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 mutual masturbation 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.
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.
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 practice and process of determining whether a girl or woman is a virgin; i.e., to determine that she has never engaged in, or been subjected to, sexual intercourse. The test typically involves a check for the presence of an intact hymen, typically on the flawed assumption that it can only be torn as a result of sexual intercourse. It has been practiced since ancient times but its recent use in the United Kingdom dates back to 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.
The vulva consists of the external female sex organs. The vulva includes the mons pubis, labia majora, labia minora, clitoris, vestibular bulbs, vulval vestibule, urinary meatus, the vaginal opening, hymen, and Bartholin's and Skene's vestibular glands. The urinary meatus is also included as it opens into the vulval vestibule. Other features of the vulva include the pudendal cleft, sebaceous glands, the urogenital triangle, and pubic hair. The vulva includes the entrance to the vagina, which leads to the uterus, and provides a double layer of protection for this by the folds of the outer and inner labia. Pelvic floor muscles support the structures of the vulva. Other muscles of the urogenital triangle also give support.
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. When present, they are often found with uterine, skeletal and urinary abnormalities. This is because these structures, like the vagina, are most susceptible to disruption during crucial times of organ-genesis. Many of these defects are classified under the broader term Müllerian duct anomalies. Müllerian duct anomalies are caused by a disturbance during the embryonic time of genitourinary development. The other isolated incidents of vaginal anomalies can occur with no apparent cause. Oftentimes vaginal anomalies are part of a cluster of defects or syndromes. In addition, inheritance can play a part as can prenatal exposure to some teratogens. Many vaginal anomalies are not detected at birth because the external genitalia appear to be normal. Other organs of the reproductive system may not be affected by an abnormality of the vagina. The uterus, fallopian tubes and ovaries can be functional despite the presence of a defect of the vagina and external genitalia. A vaginal anomaly may not affect fertility. Though it depends on the extent of the vaginal defect, it is possible for conception to occur. In instances where a functional ovary exists, IVF may be successful. Functioning ovaries in a woman with a vaginal defect allows the implantation of a fertilized ovum into the uterus of an unaffected gestational carrier, usually another human. A successful conception and can occur. Vaginal length varies from 6.5 to 12.5 cm. Since this is slightly shorter than older descriptions, it may impact the diagnosis of women with vaginal agenesis or hypoplasia who may unnecessarily be encouraged to undergo treatment to increase the size of the vagina. Vaginal anomalies may cause difficulties in urination, conception, pregnancy, impair sex. Psychosocial effects can also exist.
References
- ↑ Hoffman, Barbara (2012). Williams gynecology, 2nd edition. New York: McGraw-Hill Medical. p. 65. ISBN 978-0071716727.
