Health condition
Androgen insensitivity adults
Androgen insensitivity syndrome (AIS) is an X-linked condition in which the body cannot respond fully to testosterone; complete AIS produces typical female development with XY chromosomes, usually diagnosed at puberty or during hernia or fertility investigations, and adults need informed, respectful specialist care.
Why trust this guide
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Editorial team
Written by our editorial team from the UK sources listed on each page.
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Sourced from guidance
Checked against current NHS and UK specialist society guidance at the time of review.
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Current for 2026
Reviewed on 2026-09-27 with the next review scheduled for 2027-09-27.
Key facts
The essentials at a glance.
The symptoms to recognise, when to seek help, which specialist to see, and what treatment usually involves.
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Complete AIS: female external development, absent uterus, sparse body hair, with testes in the abdomen or groin and a 46,XY karyotype
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Partial AIS spans a wide range of presentations and is managed individually
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Common adult issues: hormone replacement after gonadectomy (or decisions about retaining gonads with surveillance), bone density, vaginal length, and psychological support
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Modern practice supports full, honest disclosure and peer support - many adults are recovering from an era of secrecy
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Care belongs in multidisciplinary DSD services; fertility is not possible with complete AIS, and support around this matters
Understanding the condition
What it is and what happens next.
What causes it, how it is diagnosed, and the treatment routes available in the UK.
What it is and how it feels
In complete AIS the androgen receptor is non-functional: testes develop and produce testosterone normally, but no tissue can hear it, so development follows the female pathway externally while the uterus (suppressed by a separate testicular hormone) does not form. Diagnosis typically comes via primary amenorrhoea at puberty or a groin hernia containing a gonad. Adults often carry complicated histories - late disclosure, unexplained surgeries, misinformation - and deserve clinicians fluent in both the endocrinology and its human weight.
Diagnosis and treatment routes
Adult care revolves around informed choices: gonadectomy timing balanced against a modest tumour risk with surveillance alternatives; oestrogen replacement for bone and wellbeing after removal; management of vaginal hypoplasia by dilation first; DEXA monitoring; and genetic counselling for family members, since carrier mothers and sisters have implications. Peer organisations add real value. Specialist DSD-experienced endocrine care is worth seeking out; a private consultation is typically available within about two weeks.
Seeing a specialist
Who to see, and how quickly you can be seen.
The specialist for this condition is usually a consultant endocrinologist, within an experienced DSD team. Your GP can refer you on the NHS, or you can arrange a private consultation directly.
A quiet reminder
This guide is for information, not medical advice.
Your GP knows your history and can tell you which parts apply to you. If in doubt, see them - and seek urgent care for any of the emergency symptoms described above.
Frequently asked
Common questions about Androgen insensitivity adults.
Quick, plain-English answers to what people ask us most.
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What is androgen insensitivity syndrome in adults?
Androgen insensitivity syndrome is a genetic condition where the body's cells cannot respond normally to male sex hormones (androgens), leading to a female external appearance despite having XY (typically male) chromosomes.
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What causes androgen insensitivity syndrome?
It is caused by mutations in the androgen receptor gene, meaning the body's tissues cannot respond to testosterone and related hormones, even though these hormones are produced normally.
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What are the symptoms of androgen insensitivity syndrome in adults?
In the complete form, individuals typically have a female appearance with absent or minimal pubic and underarm hair, and typically an absence of menstruation, since internal reproductive structures develop differently.
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Is androgen insensitivity syndrome dangerous?
It is not dangerous to general health directly, but it has significant implications for fertility and requires careful, sensitive specialist management, including consideration of gonadal tissue removal at an appropriate time due to a modest cancer risk.
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Is androgen insensitivity syndrome genetic?
Yes, it is an X-linked genetic condition, meaning it is caused by a mutation on the X chromosome, and can be inherited from a carrier mother, though it can also occur as a new genetic change.
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Can androgen insensitivity syndrome be treated?
There is no cure for the underlying genetic condition, but hormone therapy, psychological support, and individualised decisions about any surgical management are used to support wellbeing and health long-term.
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How is androgen insensitivity syndrome managed in adults?
Management is highly individualised and may include hormone therapy, psychological support, fertility counselling, and monitoring or management of internal gonadal tissue due to its specific cancer risk profile.
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Complete vs partial androgen insensitivity syndrome — what's the difference?
Complete androgen insensitivity syndrome involves a total lack of response to androgens, resulting in a fully female external appearance, while partial androgen insensitivity syndrome involves some residual response, leading to variable genital appearance that can range widely between individuals.
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When should I see a doctor about possible androgen insensitivity syndrome, and how quickly can I be seen privately?
See a doctor for unexplained absence of periods with typical female development, or any diagnosis needing ongoing specialist input. NHS endocrinology referral can take several weeks, while private specialist assessment is often available within about two weeks.