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Living with Hypogonadotropic hypogonadism 3 with or without anosmia

A hormone condition with low sex hormones that delays puberty, with or without a reduced sense of smell.

Understanding Hypogonadotropic hypogonadism 3 with or without anosmia

Hypogonadotropic hypogonadism 3 with or without anosmia is a form of isolated GnRH deficiency, a condition of low sex hormones.

People have low levels of the hormones LH and FSH and low sex steroids. About 40% have a normal sense of smell, and about 60% have an impaired sense of smell (Kallmann syndrome). It can first show in infancy, adolescence, or adulthood. Adults may have little sexual development and infertility.

Signs & symptoms

Symptoms vary from person to person. GARD lists these among the most common:

  • Reduced sense of smell (hyposmia)
  • Missing olfactory bulb (smell nerve area)
  • Flat feet

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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

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

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
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
Which hormone treatments can start or support puberty?
How can fertility be supported?
Would genetic testing help our family?

Quick facts

InheritanceAutosomal Dominant

GARD lists autosomal dominant inheritance, meaning one changed copy of a gene can be enough to cause it. It doesn't name a gene for this type.

Also known as: hh3; hypogonadotropic hypogonadism 3 with anosmia; hypogonadotropic hypogonadism caused by mutation in prokr2; prokr2 hypogonadotropic hypogonadism

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Hypogonadotropic hypogonadism 3 with or without anosmiaGARD ID 3073 · 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 Hypogonadotropic hypogonadism 3 with or without anosmia.

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  • Recruiting studies from ClinicalTrials.gov
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  • Eligibility is confirmed by the study team

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