Human vaginal size

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The vagina within the female genitals Scheme female reproductive system (vagina crop)-en.svg
The vagina within the female genitals

The dimensions and shape of human vaginas are of great importance in medicine and surgery, in addition to their relevance to sexual pleasure and childbirth; there appears to be no one way, however, to characterize the vagina's size and shape. [1] In addition to variations from individual to individual, the size and shape of a vagina in the baseline state can vary substantially during sexual arousal and intercourse. [2]

Contents

Carrying a baby to term, i.e. parity , is associated with a significant increase in the length of the vaginal fornix. [1] The potential effect of parity may be the result of a stretching and elongation of the birth canal at the time of vaginal birth. [1]

There are a number of studies that have been done into the dimensions of the human vagina, but it has not been as intensively researched as human penis size. [1]

Dimensions in the baseline state

The opening to the human vagina lies just below the urethral opening at the back of the vestibule Rugae vaginales.jpg
The opening to the human vagina lies just below the urethral opening at the back of the vestibule

A 1996 study by Pendergrass et al. using vinyl polysiloxane castings taken from the vaginas of 39 Caucasian women, found the following ranges of dimensions: [3]

A second study by the same group showed significant variations in size and shape between the vaginas of women of different ethnic groups. [4] Both studies showed a wide range of vaginal shapes, described by the researchers as "Parallel sided, conical, heart, [...] slug" [3] and "pumpkin seed" [4] shapes. Barnhart et al., however, were not able to find any correlation amongst the race and the size of vagina. They were also unable to characterize the vaginal shape as a "heart, slug, pumpkin seed or parallel sides" as suggested by the previous studies. [1] [5] A 2003 study by the group of Pendergrass et al. also using castings as a measurement method, measured vaginal surface areas ranging from 66 to 107 cm2 (10.2 to 16.6 sq in) with a mean of 87 cm2 (13.5 sq in) and a standard deviation of 7.8 cm2 (1.21 sq in) [6]

Research published in 2006 by Barnhart et al., gave the following mean dimensions, based on MRI scans of 28 women: [1]

A 2006 U.S. study of vagina sizes using Magnetic Resonance Imaging (MRI) on 28 volunteers between 18 and 39 years old, with heights ranging from 1.5 to 1.7 metres (4 ft 11 in to 5 ft 7 in), and weights between 49.9 and 95.3 kilograms (110 and 210 lb), revealed a greater than 100 percent variation between the shortest (40.8 millimetres (1.61 in)) and the longest (95.0 millimetres (3.74 in)) vagina length. [7]

Medical devices

Given the large range in vaginal dimensions noted in studies such as the above, many fitted vaginal devices, for example pessaries, do not adhere to a "one-size-fits-all" principle. [8]

Sexual arousal

Lawrence, citing Masters and Johnson's Human Sexual Response (1966), states that pages 73 and 74 of that book show that typical vaginal depth in Masters and Johnson's participants ranged from 7–8 cm (2.8–3.1 in) in an unstimulated state, to 11–12 cm (4.3–4.7 in) during sexual arousal with a speculum in place. [2]

See also

Related Research Articles

<span class="mw-page-title-main">Vagina</span> Part of the female reproductive tract

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.

<span class="mw-page-title-main">G-spot</span> Hypothesized anatomical detail

The G-spot, also called the Gräfenberg spot, is characterized as an erogenous area of the vagina that, when stimulated, may lead to strong sexual arousal, powerful orgasms and potential female ejaculation. It is typically reported to be located 5–8 cm (2–3 in) up the front (anterior) vaginal wall between the vaginal opening and the urethra and is a sensitive area that may be part of the female prostate.

<span class="mw-page-title-main">Bartholin's gland</span> Mucous glands located near the vaginal opening

The Bartholin's glands are two pea-sized compound alveolar glands located slightly posterior and to the left and right of the opening of the vagina. They secrete mucus to lubricate the vagina.

In medicine, prolapse is a condition in which organs fall down or slip out of place. It is used for organs protruding through the vagina, rectum, or for the misalignment of the valves of the heart. A spinal disc herniation is also sometimes called "disc prolapse". Prolapse means "to fall out of place", from the Latin prolabi meaning "to fall out".

<span class="mw-page-title-main">Episiotomy</span> Surgical incision of the perineum and the posterior vaginal wall

Episiotomy, also known as perineotomy, is a surgical incision of the perineum and the posterior vaginal wall generally done by an obstetrician. This is usually performed during the second stage of labor to quickly enlarge the aperture, allowing the baby to pass through. The incision, which can be done from the posterior midline of the vulva straight toward the anus or at an angle to the right or left, is performed under local anesthetic, and is sutured after delivery.

<span class="mw-page-title-main">Hysterectomy</span> Surgical removal of the uterus

Hysterectomy is the surgical removal of the uterus and cervix. Supracervical hysterectomy refers to removal of the uterus while the cervix is spared. These procedures may also involve removal of the ovaries (oophorectomy), fallopian tubes (salpingectomy), and other surrounding structures. The term “partial” or “total” hysterectomy are lay-terms that incorrectly describe the addition or omission of oophorectomy at the time of hysterectomy. These procedures are usually performed by a gynecologist. Removal of the uterus renders the patient unable to bear children and has surgical risks as well as long-term effects, so the surgery is normally recommended only when other treatment options are not available or have failed. It is the second most commonly performed gynecological surgical procedure, after cesarean section, in the United States. Nearly 68 percent were performed for conditions such as endometriosis, irregular bleeding, and uterine fibroids. It is expected that the frequency of hysterectomies for non-malignant indications will continue to fall given the development of alternative treatment options.

A pessary is a prosthetic device inserted into the vagina for structural and pharmaceutical purposes. It is most commonly used to treat stress urinary incontinence to stop urinary leakage and to treat pelvic organ prolapse to maintain the location of organs in the pelvic region. It can also be used to administer medications locally in the vagina or as a method of contraception.

Vaginoplasty is any surgical procedure that results in the construction or reconstruction of the vagina. It is a type of genitoplasty. Pelvic organ prolapse is often treated with one or more surgeries to repair the vagina. Sometimes a vaginoplasty is needed following the treatment or removal of malignant growths or abscesses to restore a normal vaginal structure and function. Surgery to the vagina is done to correct congenital defects to the vagina, urethra and rectum. It may correct protrusion of the urinary bladder into the vagina (cystocele) and protrusion of the rectum (rectocele) into the vagina. Often, a vaginoplasty is performed to repair the vagina and its attached structures due to trauma or injury.

<span class="mw-page-title-main">Cystocele</span> Medical condition

The cystocele, also known as a prolapsed bladder, is a medical condition in which a woman's bladder bulges into her vagina. Some may have no symptoms. Others may have trouble starting urination, urinary incontinence, or frequent urination. Complications may include recurrent urinary tract infections and urinary retention. Cystocele and a prolapsed urethra often occur together and is called a cystourethrocele. Cystocele can negatively affect quality of life.

<span class="mw-page-title-main">Pelvic organ prolapse</span> Descent of the pelvic organs from their normal positions

Pelvic organ prolapse (POP) is characterized by descent of pelvic organs from their normal positions into the vagina. In women, the condition usually occurs when the pelvic floor collapses after gynecological cancer treatment, childbirth or heavy lifting. Injury incurred to fascia membranes and other connective structures can result in cystocele, rectocele or both. Treatment can involve dietary and lifestyle changes, physical therapy, or surgery.

<span class="mw-page-title-main">Vaginal discharge</span> Medical condition

Vaginal discharge is a mixture of liquid, cells, and bacteria that lubricate and protect the vagina. This mixture is constantly produced by the cells of the vagina and cervix, and it exits the body through the vaginal opening. The composition, amount, and quality of discharge varies between individuals and can vary throughout the menstrual cycle and throughout the stages of sexual and reproductive development. Normal vaginal discharge may have a thin, watery consistency or a thick, sticky consistency, and it may be clear or white in color. Normal vaginal discharge may be large in volume but typically does not have a strong odor, nor is it typically associated with itching or pain. While most discharge is considered physiologic or represents normal functioning of the body, some changes in discharge can reflect infection or other pathological processes. Infections that may cause changes in vaginal discharge include vaginal yeast infections, bacterial vaginosis, and sexually transmitted infections. The characteristics of abnormal vaginal discharge vary depending on the cause, but common features include a change in color, a foul odor, and associated symptoms such as itching, burning, pelvic pain, or pain during sexual intercourse.

<span class="mw-page-title-main">Uterine prolapse</span> Medical condition

Uterine prolapse is a form of pelvic organ prolapse in which the uterus and a portion of the upper vagina protrude into the vaginal canal and, in severe cases, through the opening of the vagina. It is most often caused by injury or damage to structures that hold the uterus in place within the pelvic cavity. Symptoms may include vaginal fullness, pain with sexual intercourse, difficulty urinating, and urinary incontinence. Risk factors include older age, pregnancy, vaginal childbirth, obesity, chronic constipation, and chronic cough. Prevalence, based on physical exam alone, is estimated to be approximately 14%.

<span class="mw-page-title-main">Vaginal flora</span> Microorganisms present in the vagina

Vaginal flora, vaginal microbiota or vaginal microbiome are the microorganisms that colonize the vagina. They were discovered by the German gynecologist Albert Döderlein in 1892 and are part of the overall human flora. The amount and type of bacteria present have significant implications for an individual's overall health. The primary colonizing bacteria of a healthy individual are of the genus Lactobacillus, such as L. crispatus, and the lactic acid they produce is thought to protect against infection by pathogenic species.

<span class="mw-page-title-main">Pelvic examination</span> Physical medical examination

A pelvic examination is the physical examination of the external and internal female pelvic organs. It is frequently used in gynecology for the evaluation of symptoms affecting the female reproductive and urinary tract, such as pain, bleeding, discharge, urinary incontinence, or trauma. It can also be used to assess a woman's anatomy in preparation for procedures. The exam can be done awake in the clinic and emergency department, or under anesthesia in the operating room. The most commonly performed components of the exam are 1) the external exam, to evaluate the vulva 2) the internal exam with palpation to examine the uterus, ovaries, and structures adjacent to the uterus (adnexae) and 3) the internal exam using a speculum to visualize the vaginal walls and cervix. During the pelvic exam, sample of cells and fluids may be collected to screen for sexually transmitted infections or cancer.

<span class="mw-page-title-main">Perineoplasty</span>

Perineoplasty denotes the plastic surgery procedures used to correct clinical conditions of the vagina and the anus. Among the vagino-anal conditions resolved by perineoplasty are vaginal looseness, vaginal itching, damaged perineum, fecal incontinence, genital warts, dyspareunia, vaginal stenosis, vaginismus, vulvar vestibulitis, and decreased sexual sensation. Depending upon the vagino-anal condition to be treated, there are two variants of the perineoplasty procedure: the first, to tighten the perineal muscles and the vagina; the second, to loosen the perineal muscles.

<span class="mw-page-title-main">Vulva</span> External genitalia of the female mammal

In mammals, the vulva consists of the external female genitalia. The human vulva includes the mons pubis, labia majora, labia minora, clitoris, 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. 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.

<span class="mw-page-title-main">Fertility testing</span>

Fertility testing is the process by which fertility is assessed, both generally and also to find the "fertile window" in the menstrual cycle. General health affects fertility, and STI testing is an important related field.

<span class="mw-page-title-main">Penile-vaginal intercourse</span> Form of human sexual intercourse

Penile-vaginal intercourse or vaginal intercourse is a form of penetrative sexual intercourse in human sexuality, in which an erect penis is inserted into a vagina. Synonyms are: vaginal sex, cohabitation, coitus, intimacy, or (poetic) lovemaking. It corresponds to mating or copulation in non-human animals.

<span class="mw-page-title-main">Vaginal evisceration</span>

Vaginal evisceration is an evisceration of the small intestine that occurs through the vagina, typically subsequent to vaginal hysterectomy, and following sexual intercourse after the surgery. It is a surgical emergency.

A urogenital fistula is an abnormal tract that exists between the urinary tract and bladder, ureters, or urethra. A urogenital fistula can occur between any of the organs and structures of the pelvic region. A fistula allows urine to continually exit through and out the urogenital tract. This can result in significant disability, interference with sexual activity, and other physical health issues, the effects of which may in turn have a negative impact on mental or emotional state, including an increase in social isolation. Urogenital fistulas vary in etiology. Fistulas are usually caused by injury or surgery, but they can also result from malignancy, infection, prolonged and obstructed labor and deliver in childbirth, hysterectomy, radiation therapy or inflammation. Of the fistulas that develop from difficult childbirth, 97 percent occur in developing countries. Congenital urogenital fistulas are rare; only ten cases have been documented. Abnormal passageways can also exist between the vagina and the organs of the gastrointestinal system, and these may also be termed fistulas.

References

  1. 1 2 3 4 5 6 Barnhart, K. T.; Izquierdo, A.; Pretorius, E. S.; Shera, D. M.; Shabbout, M.; Shaunik, A. (2006). "Baseline dimensions of the human vagina". Human Reproduction. 21 (6): 1618–1622. CiteSeerX   10.1.1.485.8802 . doi:10.1093/humrep/del022. PMID   16478763.
  2. 1 2 Anne A. Lawrence. "Notes on Genital Dimensions". Archived from the original on March 24, 2006. Retrieved 2012-05-13.
  3. 1 2 Pendergrass, P. B.; Reeves, C. A.; Belovicz, M. W.; Molter, D. J.; White, J. H. (1996). "The shape and dimensions of the human vagina as seen in three-dimensional vinyl polysiloxane casts". Gynecologic and Obstetric Investigation. 42 (3): 178–182. doi:10.1159/000291946. PMID   8938470.
  4. 1 2 Pendergrass, P. B.; Reeves, C. A.; Belovicz, M. W.; Molter, D. J.; White, J. H. (2000). "Comparison of vaginal shapes in Afro-American, Caucasian and Hispanic women as seen with vinyl polysiloxane casting". Gynecologic and Obstetric Investigation. 50 (1): 54–59. doi:10.1159/000010281. PMID   10895030. S2CID   37395321.
  5. "The Social - How much do you know about vaginas?". TheSocial.ca. Archived from the original on December 14, 2017. Retrieved 1 January 2018.
  6. .Pendergrass, P. B.; Belovicz, M. W.; Reeves, C. A. (2003). "Surface area of the human vagina as measured from vinyl polysiloxane casts". Gynecologic and Obstetric Investigation. 55 (2): 110–113. doi:10.1159/000070184. PMID   12771458. S2CID   27781106.
  7. Barnhart, Kurt T.; Izquierdo, Adriana; Pretorius, E. Scott; Shera, David M.; Shabbout, Mayadah; Shaunik, Alka (2006). "Baseline dimensions of the human vagina". Human Reproduction. 21 (6): 1618–1622. doi: 10.1093/humrep/del022 . PMID   16478763 . Retrieved 27 January 2020.
  8. Ding, Jing; Song, Xiao-Chen; Deng, Mou; Zhu, Lan (3 June 2016). "Which factors should be considered in choosing pessary type and size for pelvic organ prolapse patients in a fitting trial?". International Urogynecology Journal. 27 (12): 1867–1871. doi:10.1007/s00192-016-3051-3. PMID   27260324. S2CID   1593002.