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Living with Hypogonadotropic hypogonadism 24 without anosmia

A hormone condition from a change in the FSHB gene, with delayed puberty and fertility problems.

Understanding Hypogonadotropic hypogonadism 24 without anosmia

Hypogonadotropic hypogonadism 24 without anosmia is a form of hypogonadotropic hypogonadism caused by a change in the FSHB gene.

The body does not make enough of the hormones that drive sexual development. It affects males and females. It is usually noticed in the teen years and adulthood.

Signs & symptoms

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

  • Delayed puberty
  • Small testicles
  • No or delayed periods
  • Low or no sperm count
  • Low sex hormone levels
  • Sparse armpit hair

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, hormone specialists, maternal-fetal medicine specialists and urinary and male reproductive system specialists.

  3. Consider genetic testing

    Changes in FSHB are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

  4. Connect with expert centers

    Resolve: The National Infertility Association and Pituitary Network Association may keep lists of experts for this condition.

Care & treatment

Care team
Genetic specialists (geneticists); Hormone specialists (endocrinologists); Maternal-fetal medicine specialists (pregnancy-related); Urinary and male reproductive system specialists (urologists)
Expert care
Expert lists: Resolve: The National Infertility Association, Pituitary Network Association
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 Resolve: The National Infertility Association and other patient organizations
  • 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 support puberty and fertility?
What can we expect for fertility?
Would genetic testing for FSHB help our family?

Quick facts

Symptoms usually startTeenager and as an Adult
InheritanceAutosomal Recessive
GenesFSHB

Changes in the FSHB gene cause this condition. It is autosomal recessive, so a child inherits a changed copy of the gene from each parent.

GeneticEndocrineUrinary and Reproductive

Also known as: follicle-stimulating hormone deficiency, isolated; fshb hypogonadotropic hypogonadism; hh24; hypogonadotropic hypogonadism 24 with or without anosmia; hypogonadotropic hypogonadism caused by mutation in fshb; isolated follicle stimulating hormone deficiency

Patient organizations

Source: NIH GARD · Hypogonadotropic hypogonadism 24 without anosmiaGARD ID 10128 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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