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PubMed This is a summary of 18 peer-reviewed journal articles Updated
Gynecology

Standard of Care: Surgery and Hormone Therapy

At a Glance

The standard of care for Swyer syndrome involves two essential steps: prophylactic surgery to remove streak gonads to prevent cancer, and hormone replacement therapy (HRT). HRT is necessary to induce puberty, build strong bones, and grow the uterus.

Treating Swyer syndrome involves two main pillars: protecting your health through surgery and supporting your body’s development through hormone therapy. Because your body does not produce its own sex hormones, medical intervention is necessary to ensure you grow into a healthy adult and avoid serious risks [1][2].

Pillar 1: Prophylactic Gonadectomy

The most urgent medical step after a diagnosis is the removal of the streak gonads, a procedure called prophylactic bilateral gonadectomy [3][4].

  • Why it is necessary: Streak gonads in individuals with a Y chromosome have a very high risk of developing malignant (cancerous) tumors. The most common is gonadoblastoma, which can progress into a more aggressive cancer called dysgerminoma [3][5].
  • The risk is early: These tumors can appear as early as infancy, throughout childhood, and during adolescence [6][7]. Because the risk is high and can happen at any time, “watchful waiting” is not recommended [8]. Additionally, if tumors do form in the streak gonads, they can sometimes produce unexpected hormones that cause unwanted changes, like excess hair growth (virilization) [9]. Prompt surgery prevents this.
  • The procedure & recovery: This is typically done using laparoscopy, a minimally invasive surgery where a surgeon makes small incisions in the abdomen to remove the streak gonads [1][10]. While the physical recovery is usually quick—allowing you to return to normal activities within a few days—the emotional recovery may take much longer. It is completely normal to feel grief, anger, or a sense of loss over having reproductive tissue removed, even if that tissue never functioned [11][12].

Pillar 2: Hormone Replacement Therapy (HRT)

Because the streak gonads cannot produce hormones, you will need Hormone Replacement Therapy (HRT). This treatment is not just about appearance; it is vital for your total body health [1][6]. You will likely continue HRT until around the typical age of natural menopause (early 50s), at which point your doctor will discuss whether to adjust or stop the hormones to mimic a natural female life cycle [1].

Why You Need HRT

  • Puberty Induction: HRT provides the estrogen needed to develop secondary sex characteristics, such as breast development and feminine body contours [1][2].
  • Bone Health: Estrogen is essential for building strong bones. Without it, you are at a very high risk for osteoporosis (weak, brittle bones) and fractures later in life [1][13].
  • Uterine Growth: Long-term HRT helps your uterus grow to a near-normal size, which is important if you choose to pursue pregnancy through egg donation in the future [14][2].

The Protocol for Pubertal Induction

For adolescents, doctors typically follow a slow, careful schedule to mimic natural puberty:

  • Transdermal Estradiol: Current guidelines prefer using a transdermal patch (placed on the skin) rather than a pill. The patch delivers 17-beta estradiol directly through the skin, which is safer for the liver and has a lower risk of blood clots than oral pills [15][16][17].
  • Gradual Titration: You will likely start with a very low dose of estrogen. Every 6 to 12 months, your doctor will slowly increase the dose over about two years [15][16].
  • Adding Progesterone: Once the uterus has had time to grow (usually after ~2 years of estrogen or once spotting occurs), a second hormone called progesterone is added. This mimics a natural cycle and will cause you to have regular monthly periods [1][14].

Side Effects and Monitoring: Like any medication, HRT can have side effects, such as breast tenderness or mood fluctuations as your body adjusts [18]. Long-term use requires routine cardiovascular monitoring and breast health screenings, just as natural hormones would dictate [1].

While these steps may feel daunting, they are the standard path to ensuring you have the same physical development and long-term health as any other young woman [14][1].

Common questions in this guide

Why do the streak gonads need to be removed in Swyer syndrome?
Streak gonads carry a very high risk of developing malignant tumors, such as gonadoblastoma. Prompt surgical removal, typically through a minimally invasive laparoscopy, is strongly recommended to prevent cancer.
Why is hormone replacement therapy necessary?
Because streak gonads do not produce hormones naturally, HRT is required to induce puberty, promote breast and uterine development, and protect against osteoporosis. This therapy is vital for your total body health.
How is hormone therapy given for puberty induction?
Doctors typically begin with a low-dose transdermal estradiol patch, which is safer for the liver and slowly increased over about two years. Once the uterus has grown, progesterone is added to start regular menstrual periods.
How does Swyer syndrome affect bone health?
Without natural estrogen production, individuals with Swyer syndrome are at a very high risk for osteoporosis and bone fractures. Hormone replacement therapy provides the essential estrogen needed to build and maintain strong bones.
Will I need to take hormone therapy for the rest of my life?
You will likely need to continue hormone replacement therapy until your early 50s. At that point, your doctor will discuss adjusting or stopping the hormones to mimic the timing of natural menopause.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.When can we schedule the laparoscopic gonadectomy, and who will be performing the procedure?
  2. 2.Can you explain the specific starting dose of transdermal estradiol and how we will titrate it over the next two years?
  3. 3.How often will we monitor my bone density (DEXA scan) once I start HRT?
  4. 4.What specific side effects should I be looking out for as I adjust to hormone therapy?
  5. 5.Are my fallopian tubes being preserved during the gonadectomy to support future fertility options?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (18)
  1. 1

    Pure 46, XY gonadal dysgenesis and 46, XY complete androgen insensitivity syndrome: A case report.

    Yu T, Liu L

    Medicine 2024; (103(25)):e38297 doi:10.1097/MD.0000000000038297.

    PMID: 38905377
  2. 2

    Two successful pregnancies after in vitro fertilisation with oocyte donation in a patient with Swyer syndrome - a case report.

    Urban A, Knap-Wielgus W, Grymowicz M, Smolarczyk R

    Przeglad menopauzalny = Menopause review 2021; (20(3)):158-161 doi:10.5114/pm.2021.109361.

    PMID: 34703418
  3. 3

    Gonadal tumor risk in pediatric and adolescent phenotypic females with disorders of sex development and Y chromosomal constitution with different genetic etiologies.

    Lu L, Luo F, Wang X

    Frontiers in pediatrics 2022; (10()):856128 doi:10.3389/fped.2022.856128.

    PMID: 35935368
  4. 4

    "Rare but Not Forgotten Five Cases of Swyer Syndrome": Case Series and Literature Review.

    Kumari P, Kumari M, Barik M, Varghese L

    Journal of obstetrics and gynaecology of India 2025; (75(6)):472-476 doi:10.1007/s13224-025-02183-9.

    PMID: 41476829
  5. 5

    Bilateral Gonadoblastoma Overgrown by Dysgerminoma of the Right Gonad in a Patient with Swyer Syndrome.

    Arafa M, Ryiami MA, Shukri MA, et al.

    Maedica 2021; (16(4)):734-737 doi:10.26574/maedica.2020.16.4.734.

    PMID: 35261680
  6. 6

    EARLY-ONSET GONADOBLASTOMA IN A 13-MONTH-OLD INFANT WITH 46,XY COMPLETE GONADAL DYSGENESIS IDENTIFIED WITH PRENATAL TESTING: A CASE OF CHROMOSOME 9p DELETION.

    Fredette ME, Cusmano K, Phornphutkul C, et al.

    AACE clinical case reports 2019; (5(6)):e380-e383 doi:10.4158/ACCR-2019-0285.

    PMID: 31967076
  7. 7

    Advanced-Stage Gonadal Dysgerminoma in a Patient With a Previous Diagnosis of Familial Swyer Syndrome: A Very Rare Genetic Entity.

    Oğlak SC, Söğütçü N, Akgöl S, et al.

    Case reports in medicine 2026; (2026()):3312911 doi:10.1155/carm/3312911.

    PMID: 41551439
  8. 8

    Unexpected diagnosis of stage IIA dysgerminoma in streak gonad in a patient with Swyer syndrome: a case report.

    Yada-Hashimoto N, Komura H, Nagata S, et al.

    Gynecological endocrinology : the official journal of the International Society of Gynecological Endocrinology 2018; (34(6)):464-466 doi:10.1080/09513590.2017.1395844.

    PMID: 29084462
  9. 9

    Atypical Presentation of Swyer Syndrome.

    Dural O, Evruke I, Can S, et al.

    Journal of pediatric and adolescent gynecology 2019; (32(6)):645-647 doi:10.1016/j.jpag.2019.07.007.

    PMID: 31356871
  10. 10

    Swyer Syndrome with Heterotopic Adrenal Cortical Tissue in Streak Gonads: A Rare Case and Review of Literature.

    Goyal M, Batra S, Singh P, et al.

    Journal of human reproductive sciences 2019; (12(4)):345-347 doi:10.4103/jhrs.JHRS_44_19.

    PMID: 32038087
  11. 11

    Molecular mechanisms underlying the defects of two novel mutations in the HSD17B3 gene found in the Tunisian population.

    Ben Rhouma B, Kley M, Kallabi F, et al.

    The Journal of steroid biochemistry and molecular biology 2023; (227()):106235 doi:10.1016/j.jsbmb.2022.106235.

    PMID: 36563763
  12. 12

    Disorders/Differences of Sex Development Presenting in the Newborn With 46,XY Karyotype.

    Bertelloni S, Tyutyusheva N, Valiani M, et al.

    Frontiers in pediatrics 2021; (9()):627281 doi:10.3389/fped.2021.627281.

    PMID: 33968844
  13. 13

    The Mysteries of Primary Amenorrhea: Swyer Syndrome.

    Cherukuri S, Jajoo SS, Dewani D, Andela M

    Cureus 2022; (14(8)):e28170 doi:10.7759/cureus.28170.

    PMID: 36158407
  14. 14

    Perspective on postoperative hormone replacement therapy and fertility preservation in Swyer syndrome with dysgerminoma: a case series and literature review.

    Liang J, Wu T, Feng X, et al.

    European journal of obstetrics, gynecology, and reproductive biology 2026; (317()):114857 doi:10.1016/j.ejogrb.2025.114857.

    PMID: 41317609
  15. 15

    Pubertal induction in Turner syndrome without gonadal function: A possibility of earlier, lower-dose estrogen therapy.

    Hasegawa Y, Hasegawa T, Satoh M, et al.

    Frontiers in endocrinology 2023; (14()):1051695 doi:10.3389/fendo.2023.1051695.

    PMID: 37056677
  16. 16

    Estrogen Replacement in Turner Syndrome: Literature Review and Practical Considerations.

    Klein KO, Rosenfield RL, Santen RJ, et al.

    The Journal of clinical endocrinology and metabolism 2018; (103(5)):1790-1803 doi:10.1210/jc.2017-02183.

    PMID: 29438552
  17. 17

    Cardiovascular health and the menopause, metabolic health.

    Anagnostis P, Stevenson JC

    Best practice & research. Clinical endocrinology & metabolism 2024; (38(1)):101781 doi:10.1016/j.beem.2023.101781.

    PMID: 37183085
  18. 18

    Sex hormone replacement therapy for individuals with Turner syndrome.

    Backeljauw P, Klein K

    American journal of medical genetics. Part C, Seminars in medical genetics 2019; (181(1)):13-17 doi:10.1002/ajmg.c.31685.

    PMID: 30809949

This page explains standard treatments for Swyer syndrome for educational purposes only. Always consult your endocrinologist or gynecologist for personalized medical advice regarding surgery and hormone therapy.

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