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Living with Pseudounicornuate uterus

A rare difference in the shape of the uterus, with one main horn and a smaller, underdeveloped second horn.

Understanding Pseudounicornuate uterus

Pseudounicornuate uterus is a rare condition in which the uterus has an unusual shape.

The uterus is small and crescent-shaped with one horn and one fallopian tube, plus a rudimentary second horn. The second horn may be solid or have a cavity lined with uterine tissue. Urinary tract differences often occur alongside it.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. The summary describes these features:

  • A small, crescent-shaped uterus with one main horn
  • A rudimentary second horn
  • Urinary tract differences

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include genetic specialists, maternal-fetal medicine specialists, urinary and male reproductive system specialists and women’s reproductive health specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Genetic specialists (geneticists); Maternal-fetal medicine specialists (pregnancy-related); Urinary and male reproductive system specialists (urologists); Women’s reproductive health specialists (obstetricians / gynecologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Does my uterine shape affect fertility or pregnancy?
Do I need a check of my kidneys and urinary tract?
Does the second horn need monitoring or treatment?

Quick facts

GARD says gene changes cause this condition. It doesn't name a gene or describe inheritance yet.

GeneticUrinary and Reproductive

Also known as: incomplete unilateral aplasia of mullerian ducts; incomplete unilateral aplasia of the mullerian ducts; incomplete unilateral aplasia of the müllerian ducts; incomplete unilateral mullerian aplasia; incomplete unilateral müllerian aplasia; unicornuate uterus with rudimentary horn

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Pseudounicornuate uterusGARD ID 20175 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Pseudounicornuate uterus.

Explore the Pseudounicornuate uterus blog

Explore research for Pseudounicornuate uterus

Explore actively recruiting Pseudounicornuate uterus studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Pseudounicornuate uterus with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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