Vaginal aplasia: causes, diagnosis, and treatment options

Vaginal aplasia is a congenital anomaly in which the vagina is completely or partially absent. It most often occurs as part of Mayer-Rokitansky-Küster-Hauser syndrome, in which a patient with a 46,XX karyotype and normal development of secondary sexual characteristics has an absent uterus and upper vagina, or these structures are represented by rudimentary ones. The external genitalia are usually formed in the female pattern, and ovarian function is often preserved. [1]

Clinically, the disease is most often diagnosed in adolescence, when menstruation does not begin by the age expected for menarche. American and international guidelines for primary amenorrhea indicate that testing is required if menstruation is absent by age 15 with normal development of secondary sexual characteristics. It is during this period that a significant proportion of patients first experience the congenital absence of the vagina and uterus. [2]

It's important to understand that vaginal aplasia is not always a single anatomical condition. Some patients have a short, blind-ending vagina or only a small indentation at the vaginal opening, others have rudimentary Müllerian structures, and still others have combined anomalies of the cervix, kidneys, or spine. Therefore, modern diagnosis is based not only on complaints but also on a detailed anatomical description. [3]

In terms of everyday life, key issues include not only the absence of menstruation, but also sexual function, self-perception, reproductive prospects, and fear of surgery and long-term treatment. Therefore, modern management of this anomaly revolves around multidisciplinary care, involving a gynecologist, a radiologist, sometimes a urologist, a geneticist, a psychologist, and, if necessary, a surgeon experienced in reconstructive procedures. [4]

In recent years, the approach to this topic has become more precise and less traumatic for the patient. While previously the emphasis was often on surgical vaginal creation, most recommendations now consider staged dilation as the first-line method, with surgery considered a second-line option. At the same time, issues of long-term quality of life, sexual comfort, screening for associated anomalies, and future motherhood are being more actively discussed. [5]

Table 1. Key concepts and codes

Position	Current information
The main clinical term	Vaginal aplasia, congenital absence of the vagina
The most common syndrome	Mayer-Rokitansky-Küster-Hauser syndrome
International Classification of Diseases, 10th revision	Q52.0 - Congenital absence of vagina
International Classification of Diseases, 11th revision	LB42.0 - absence of vagina
Typical karyotype in Mayer-Rokitansky-Küster-Hauser syndrome	46,XX
The most typical first manifestation	Primary amenorrhea

Sources for the table. [6]

Epidemiology, forms and causes

The most common clinical form of vaginal aplasia is Mayer-Rokitansky-Küster-Hauser syndrome. Modern reviews estimate its prevalence at approximately 1 in 5,000 live births, although the figures vary across studies. This variability is due to the rarity of the condition, heterogeneity in inclusion criteria, and the fact that some older publications grouped several different anomalies together. [7]

The syndrome is traditionally divided into two major forms. In type 1, the lesion is limited to the genitals and manifests as isolated aplasia of the uterus and upper vagina. In type 2, the genital tract anomaly is accompanied by extragenital defects, most commonly involving the kidneys and skeleton. Historically, severe combined variants have also been described as an association of Müllerian aplasia, renal aplasia, and cervicothoracic somite anomalies, but in modern practice they are usually classified as type 2. [8]

The embryological basis of the disease is associated with a developmental disorder of the paramesonephric ducts, which normally form the uterus, cervix, and upper two-thirds of the vagina. The lower part of the vagina develops from the urogenital sinus, so with this anomaly, the patient may retain a short, blind vaginal pouch or a small depression at the entrance. This feature explains the variety of anatomical variants. [9]

The cause remains unclear in most cases. Recent reviews point to the likely role of hereditary and embryonic factors, but a single mutation universal to all patients has not been found. Isolated genetic findings are more frequently described in associations of vaginal aplasia with renal anomalies, but even in these cases, the genetic result only explains a subset of the observations. [10]

A practically important conclusion is that vaginal aplasia is not a consequence of the patient's behavior, lifestyle, or actions during adolescence. It is a congenital condition that develops during the prenatal period. This formulation is important for counseling, as feelings of guilt and misconceptions about the causes of the diagnosis are common among patients. [11]

Table 2. Main forms of vaginal aplasia

Form	What is typical
Isolated vaginal aplasia	Absence or underdevelopment of the vagina without significant extragenital anomalies
Mayer-Rokitansky-Küster-Hauser syndrome type 1	Isolated aplasia of the uterus and upper vagina
Mayer-Rokitansky-Küster-Hauser syndrome type 2	Aplasia of the uterus and vagina in combination with anomalies of the kidneys, skeleton, and sometimes hearing and heart
Obstructive defects that can mimic the picture	Transverse vaginal septum, cervical atresia, distal vaginal atresia
Conditions for differential diagnosis	Androgen insensitivity syndrome, gonadal dysgenesis, rare enzyme defects

Sources for the table. [12]

Clinical presentation and associated abnormalities

The most typical initial manifestation is primary amenorrhea with normal mammary gland development and normal hair growth. The adolescent develops according to female patterns, but menstruation does not begin. It is this combination—normal puberty and the absence of menarche—that should raise concerns about Müllerian agenesis and vaginal aplasia. [13]

Examination may reveal a short vagina, a blind-ending canal, or a small depression in place of the normal vaginal lumen. The cervix is often not visible. However, examination alone is not enough: a transverse vaginal septum, cervical atresia, and androgen insensitivity syndrome can all produce a similar appearance. Therefore, clinical impressions must be confirmed by imaging and laboratory tests. [14]

Although many patients do not experience cyclical pain, such a symptom is possible if rudimentary Müllerian structures with a functioning endometrium are present. In this case, recurring lower abdominal pain, hematometra in the rudimentary cavity, and even endometriosis may occur. Therefore, the absence of a uterus, according to preliminary data, does not always mean a complete absence of any cyclic activity. [15]

Associated anomalies are of great practical importance. According to modern reviews and clinical guidelines, a significant proportion of female patients have congenital abnormalities of the urinary system, primarily unilateral renal agenesis, pelvic kidney, horseshoe kidney, or duplication of the renal pelvis. Spinal anomalies have also been described, and, less commonly, hearing impairment and cardiac defects. Therefore, after diagnosis is confirmed, examination should not be limited to the pelvis. [16]

The psychological reaction to the diagnosis deserves special mention. For a teenager or young woman, the combination of primary amenorrhea, a complex anatomical diagnosis, and information about pregnancy problems is often accompanied by shock, anxiety, depressive reactions, questions of identity, and fear of future relationships. Contemporary reviews emphasize that emotional support is needed not after the completion of treatment, but from the very moment of diagnosis. [17]

Table 3. What may be included in the clinical picture

Sign	How typical is it?	What does it mean?
Primary amenorrhea	Very typical	Often the first reason for examination
Normal development of mammary glands	Very typical	Indirectly indicates the preserved function of the ovaries
Normal hair growth	Typically	Helps differentiate from complete androgen insensitivity
Short blind vagina or recess	Often	Supports diagnosis but does not replace imaging.
Cyclic pain in the lower abdomen	Not always	Makes you think about functioning rudiments and endometriosis
Kidney or spinal abnormalities	Often	Require separate screening

Sources for the table. [18]

Diagnostics

The diagnostic algorithm begins with a proper assessment of primary amenorrhea. If menstruation has not occurred by age 15 or if a genital tract anomaly is suspected earlier, the examination should be targeted and stepwise. The patient's medical history allows for clarification of the timing of puberty, the presence of cyclic pain, urinary habits, family history of malformations, and the patient's emotional state. [19]

The next step is a careful physical examination. This should be as delicate as possible, especially in adolescents. The doctor assesses the development of secondary sexual characteristics, the condition of the external genitalia, the presence or absence of a normal vaginal canal, and the ability to identify the cervix. However, even the most experienced examination cannot always distinguish vaginal aplasia from obstructive defects, so instrumental methods are crucial. [20]

Ultrasound of the pelvis and urinary tract is typically used as the first imaging step. It helps assess the presence of the uterus, rudimentary structures, and ovaries, while simultaneously identifying renal anomalies. However, ultrasound imaging is not always complete, especially before puberty or when small rudiments are present. Therefore, if vaginal aplasia is suspected, pelvic magnetic resonance imaging is considered the most informative method for anatomical verification. [21]

Laboratory tests are needed not to confirm the absence of a vagina per se, but to properly differentiate the diagnosis. Current guidelines for this condition include determination of follicle-stimulating hormone, testosterone, and karyotyping. This helps distinguish typical Müllerian agenesis from complete androgen insensitivity, gonadal dysgenesis, and some rare endocrine disorders. [22]

Diagnostic laparoscopy is rarely required today. With high-quality magnetic resonance imaging (MRI) performed and interpreted by an experienced specialist, pelvic anatomy can usually be described without invasive intervention. Laparoscopy is considered more in specific situations, such as suspected endometriosis, active endometrium in rudimentary structures, or when planning surgical treatment. [23]

Table 4. Modern diagnostic algorithm

Stage	What are they doing?	Why is this necessary?
1	Confirm primary amenorrhea	Determine the need for targeted testing
2	They conduct a careful inspection	A short or absent vagina is detected
3	Perform an ultrasound examination of the pelvis and urinary system	The uterus, ovaries and kidneys are assessed
4	Magnetic resonance imaging of the pelvis is performed	Describes the anatomy and rudimentary structures in detail
5	A karyotype and hormonal tests are prescribed.	Distinguish from androgen insensitivity syndrome and gonadal dysgenesis
6	If necessary, referrals are made for additional examinations of the spine, hearing, and heart.	They are looking for extragenital anomalies

Sources for the table. [24]

Differential diagnosis

One of the main conditions for comparison is complete androgen insensitivity. In both cases, and with vaginal aplasia, the patient may experience primary amenorrhea, a short vagina, and an absent uterus. However, with complete androgen insensitivity, the karyotype is 46,XY, testicular gonads are present, and axillary and pubic hair is usually sparse. In contrast, with Mayer-Rokitansky-Küster-Hauser syndrome, the karyotype is female, the ovaries are functional, and hair growth usually develops normally. [25]

The second important group are obstructive genital tract defects. Imperforated hymen, transverse vaginal septum, distal vaginal atresia, and cervical atresia may be accompanied by the absence of normal menstrual flow. Unlike typical Müllerian agenesis, such patients more often experience cyclic pain, and imaging may reveal hematocolpos, hematometra, or dilated cavities above the level of the obstruction. [26]

Gonadal dysgenesis is also important to consider. In this condition, primary amenorrhea is associated not so much with normal puberty as with insufficient mammary gland development or other signs of hypogonadism. Therefore, the clinical context is different: with vaginal aplasia, puberty often proceeds normally, while with gonadal dysgenesis, the problem usually also affects ovarian function. [27]

Enzymatic disorders of steroidogenesis, including some forms of congenital adrenal hyperplasia, rarely need to be ruled out. In these cases, clinical presentation, androgen levels, pubertal data, and karyotype are helpful. Therefore, current guidelines rightly emphasize that a diagnosis of vaginal aplasia should not be made solely on the basis of an ultrasound finding of the absence of the uterus. [28]

An accurate differential diagnosis directly influences treatment decisions. Some conditions require vaginal reconstruction, others require removal of obstruction to menstrual flow, and still others require management of sexual development disorders and discussion of gonadal risk. Therefore, the safest route is considered to be through a specialized center with experience in treating adolescents and young women with congenital genital tract anomalies. [29]

Table 5. How vaginal aplasia differs from similar conditions

State	Menses	Mammary glands	Hairiness	Uterus	Karyotype
Vaginal aplasia in Mayer-Rokitansky-Küster-Hauser syndrome	No	Usually developed	Usually normal	Absent or rudimentary	46,XX
Complete androgen insensitivity	No	Usually developed	Often meager	Absent	46,XY
Transverse septum of the vagina	No external menstruation	Usually developed	Usually normal	Usually there is	Most often 46,XX
Cervical atresia	No external menstruation	Usually developed	Usually normal	There is, but the outflow is impaired	Most often 46,XX
Gonadal dysgenesis	No	Often underdeveloped	It may be reduced	Variable	Variable

Sources for the table. [30]

Treatment

The modern treatment principle is that therapy begins not at the moment the anatomical feature is discovered, but when the patient is psychologically ready and personally motivated to develop a functional vagina. Guidelines emphasize that treatment is typically offered in late adolescence or early adulthood, when full informed consent and good adherence can be expected. [31]

Gradual dilation is considered the first line of treatment. According to guidelines and modern reviews, with good training and regular follow-up, anatomical and functional success is achieved in approximately 90%-96% of patients. It is safer, less traumatic, and less expensive than surgery, and the results in terms of sexual function are comparable to those of surgical treatment in some studies. [32]

The method involves the regular use of dilators, gradually increasing their length and diameter. Clinical guidelines recommend that pressure be directed and controlled, avoiding trauma to the urethra and rectum, and that a single session typically lasts approximately 20 minutes per day. More frequent visits are required in the early stages, and then monitoring continues until sufficient length and comfort are achieved. Pelvic physiotherapist assistance may be an important adjunct. [33]

Surgical neovagina formation is considered when dilation has proven ineffective, is unacceptable to the patient, or when, after detailed discussion, surgical intervention is chosen. Various techniques exist, including the Makindoo modification, the Vecchietti method, the Davydov method, and operations using an intestinal segment. No single procedure is universally best for all cases, and success largely depends on the center's experience and subsequent adherence to the dilation regimen. [34]

After surgery, there are risks of stenosis, prolapse, scarring, damage to adjacent organs, and problems with the graft or intestinal segment, depending on the technique. Therefore, the modern approach does not romanticize surgery as a simple, definitive solution. Even after a successful neovagina is created, the patient requires long-term follow-up, and in the absence of a cervix, routine cervical cytology is not indicated, although routine gynecological examinations, infection prevention, human papillomavirus vaccination, and assessment of complaints remain important. [35]

Table 6. Treatment options and their place in practice

Method	When is it applied?	Key Benefits	Main limitations
Gradual dilation	First line in most patients	No surgery, high success rate, controlled by the patient herself	Requires motivation, time and proper technique
Pelvic floor physiotherapy as a complement	During dilation and after surgery	Improves comfort, helps with pain and technical difficulties	Does not replace the main method
Operation Makindu	If dilation fails or surgery is chosen	Proven technology	Risks of scarring, stenosis, and the need for postoperative dilation
Vecchietti's method	In specialized centers	Good anatomical results	Surgical invasiveness
Davydov's method	In specialized centers	Use of peritoneum, good functional results	Risk of complications and prolapse
Intestinal vaginoplasty	For certain indications	Possibility of creating a channel of sufficient length	Higher surgical burden and specific complications

Sources for the table. [36]

Reproductive prospects, quality of life and prognosis

Although the uterus is absent in typical Mayer-Rokitansky-Küster-Hauser syndrome, the ovaries are intact and function normally in most patients. This means that ovulation and oocyte production are usually possible. Therefore, the diagnosis does not equate to a complete loss of genetic motherhood, although carrying a pregnancy without a uterus is impossible. [37]

Traditionally, the primary paths to parenthood were considered to be adoption and the use of one's own eggs with gestational carriers, where permitted by law. Current recommendations emphasize the need to discuss these options with the patient early and honestly, without postponing the conversation until some indefinite future date. For many women, this aspect of counseling becomes central after diagnosis. [38]

In recent years, uterine transplantation has ceased to be merely an experimental concept. Following the first live birth in 2014, this approach has become a viable treatment option for absolute uterine infertility in specialized programs. However, the method remains complex: it involves extensive surgery, risks for both donor and recipient, the need for immunosuppression, and high cost. Therefore, it is too early to consider it a routine procedure, but it can no longer be ignored. [39]

Quality of life after treatment can be good, especially if the chosen method meets the patient's expectations and is accompanied by psychological support. Current data show that the length of the neovagina itself is not the only criterion for success. More important are comfort, absence of pain, the possibility of desired sexual activity, a sense of control over one's own body, and reduced distress. [40]

The prognosis for life is favorable, but the prognosis for daily well-being depends on timely diagnosis, proper treatment, and quality of care. In the absence of severe associated anomalies and with access to specialized care, most patients can lead full lives, build relationships, and realize various parenting scenarios. The worst outcomes are usually associated not with the defect itself, but with late diagnosis, traumatic counseling, unsuccessful interventions, and a lack of psychological support. [41]

Table 7. What needs to be monitored after diagnosis

Direction of observation	What is important
Anatomical assessment	Confirmation of the anomaly variant and the presence of rudimentary structures
Kidneys and urinary tract	Search for agenesis, pelvic kidney, horseshoe kidney and other defects
Spine	Exclusion of associated skeletal anomalies
Pain and cyclic symptoms	Search for functioning endometrium and endometriosis
Psychological state	Screening for anxiety, depression, distress, identity and relationship issues
Sexual function	Comfort, pain, satisfaction, need for treatment adjustments
Reproductive counseling	Discussion of oocytes, gestational carriers, uterine transplantation, adoption

Sources for the table. [42]

FAQ

What does the diagnosis of vaginal aplasia most often mean?

Most often, this refers to a congenital underdevelopment or absence of the vagina, often as part of Mayer-Rokitansky-Küster-Hauser syndrome, which also involves the absence of the uterus or most of it. However, the final diagnosis depends on the individual patient's anatomy and imaging results. [43]

Why does the patient have breasts and normal female development if the uterus is absent?

Because in the typical form of the disease, the ovaries usually function normally and produce sex hormones. It is the hormonal function of the ovaries, not the presence of the uterus, that is responsible for the development of the mammary glands and other signs of puberty. [44]

Can this condition be confused with another disease?

Yes, and this is one of the reasons why the diagnosis must be confirmed in stages. The most common similarities are with complete androgen insensitivity, transverse vaginal septum, cervical atresia, and some forms of gonadal dysgenesis. [45]

Do all patients need surgery?

No. The current standard of care considers gradual dilation to be the first-line treatment for most patients. Surgery is not necessary for everyone and is usually considered only after a conservative approach has failed or at the patient's discretion. [46]

How effective is dilation?

With proper training, motivation, and monitoring, success is achieved in approximately 90%-96% of patients. This is one of the strongest arguments in favor of not starting treatment immediately with surgery. [47]

Can there be pain if there is no uterus?

Yes. Pain is possible in the presence of rudimentary structures with a functioning endometrium, in endometriosis, as well as after unsuccessful treatment or against the background of pelvic muscle tension. Therefore, cyclic pain requires further evaluation rather than simple reassurance. [48]

Is pregnancy possible?

Carrying a pregnancy on your own without a uterus is impossible. However, if ovarian function is intact, retrieving your own oocytes is possible. Depending on legislation and the center's capabilities, gestational carriers may be discussed, and in some highly specialized programs, uterine transplantation may be possible. [49]

Is it necessary to examine the kidneys and spine?

Yes. This is a mandatory part of modern care, because a significant proportion of patients have concomitant urinary and skeletal anomalies. Limiting the examination to a pelvic examination alone is not enough. [50]

Do you need psychological help?

Yes, and preferably from the very beginning. Contemporary publications emphasize that the diagnosis is often accompanied by anxiety, depressive reactions, difficulties with body acceptance, and worries about future motherhood and relationships. [51]

Is regular gynecological examination necessary after treatment?

Yes. Even in the absence of a cervix and the need for routine cytology, there remains a need for assessment of complaints, infection prevention, monitoring of the length and patency of the neovagina, assessment of pain and long-term comfort. [52]