GNRHR rs104894339: Understanding This Rare Genetic Variant
The rs104894339 variant is a rare genetic change located within the GNRHR gene, which provides instructions for making the gonadotropin-releasing hormone receptor. This variant is associated with hypogonadotropic hypogonadism type 7, a condition characterized by the failure to produce sufficient sex hormones due to impaired signaling in the reproductive axis.
What each genotype means
Typical GNRHR function
This genotype represents the common, functional version of the GNRHR gene. Individuals with this profile do not carry the specific pathogenic variant associated with autosomal recessive hypogonadotropic hypogonadism type 7.
This is the most common genotype found in the general population across all ancestries.
GNRHR variant carrier
You carry one copy of the pathogenic variant and one copy of the functional gene. Because this condition is inherited in an autosomal recessive manner, carriers typically do not exhibit symptoms of hypogonadotropic hypogonadism.
This genotype is extremely rare in the general population, as the variant itself is ultra-rare.
Potential GNRHR-related condition
This genotype indicates the presence of two copies of the pathogenic variant, which is associated with hypogonadotropic hypogonadism type 7. This condition can lead to absent or incomplete pubertal development due to impaired GnRH signaling; please consult with a reproductive endocrinologist or genetic counselor to discuss clinical implications.
This genotype is exceptionally rare and is primarily identified in clinical cohorts of individuals diagnosed with idiopathic hypogonadotropic hypogonadism.
What is the rs104894339 Variant?
The rs104894339 variant is a specific change in the DNA sequence of the GNRHR gene. In genetics, a variant like this is often referred to as a single nucleotide polymorphism (SNP) or a point mutation, depending on its frequency and impact. This particular variant is classified as a missense mutation, meaning it results in a change to the amino acid sequence of the protein produced by the gene. The GNRHR gene is located on chromosome 4 and encodes the receptor for gonadotropin-releasing hormone (GnRH). This receptor is critical for the endocrine system, as it sits on the surface of pituitary cells and receives signals that trigger the release of hormones necessary for reproductive development and function. Because this variant alters the structure of this receptor, it can potentially disrupt the normal communication pathway required for puberty and fertility.
The Role of the GNRHR Gene
The GNRHR gene is essential for the proper functioning of the hypothalamic-pituitary-gonadal axis. The protein it encodes, the GnRH receptor, is a G protein-coupled receptor that spans the cell membrane. When GnRH is released from the hypothalamus, it binds to these receptors on the pituitary gland, stimulating the secretion of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). These hormones are vital for the development of the gonads—the testes in males and the ovaries in females—and for the production of sex steroids like testosterone and estrogen. When the GNRHR gene contains pathogenic variants, the receptor may fail to bind GnRH effectively or fail to signal correctly, leading to a deficiency in LH and FSH. This lack of hormonal stimulation results in the clinical features associated with hypogonadotropic hypogonadism, such as delayed or absent puberty and infertility.
Research and Clinical Associations
Scientific research has linked biallelic mutations in the GNRHR gene to hypogonadotropic hypogonadism type 7 (HH7). This condition is typically inherited in an autosomal recessive pattern, meaning an individual must inherit two copies of a pathogenic variant—one from each parent—to manifest the clinical symptoms. Research indicates that individuals with these variants may experience normosmic idiopathic hypogonadotropic hypogonadism (nIHH), where the sense of smell remains intact, distinguishing it from Kallmann syndrome. The evidence strength for GNRHR variants in causing this condition is considered moderate to strong in clinical genetics literature. However, it is important to note that the presence of a single copy of a variant (heterozygosity) is often asymptomatic, as the body can typically function with one working copy of the gene. Clinical interpretation of such variants requires careful analysis of family history and hormonal profiles.
Population Frequency and Interpretation
The rs104894339 variant is classified as an ultra-rare variant in the general population. Because it is so rare, it is not typically found in large-scale population databases at high frequencies. In genetic studies, the rarity of a variant is a key factor in determining its potential pathogenicity; variants that are common in the general population are less likely to be the sole cause of rare, severe genetic disorders. When clinicians encounter such rare variants, they often use specialized databases to compare the patient's genetic profile against known pathogenic mutations. If you have received information about this variant from a genetic test, it is essential to understand that genetic findings are only one piece of a larger clinical puzzle. You should discuss these results with a qualified healthcare provider or a genetic counselor who can interpret the findings in the context of your personal and family health history.
How common is this variant?
The rs104894339 variant is an ultra-rare genetic change, with extremely low allele frequencies observed across global populations in databases like gnomAD.
Frequently asked questions
What is hypogonadotropic hypogonadism?
Hypogonadotropic hypogonadism is a condition where the body does not produce enough sex hormones because the pituitary gland is not receiving the correct signals from the brain. This often leads to delayed or absent puberty and can affect fertility.
Does having this variant mean I have a disease?
Not necessarily. Because this condition is typically recessive, having one copy of the variant usually does not cause symptoms. A diagnosis is only made by a doctor based on clinical symptoms, hormone levels, and physical exams, not just a genetic test result.
Can I change my genotype?
No, your genotype is determined at conception and cannot be changed. Genetic information is a static record of your inherited DNA sequence.
What should I do if I am concerned about this result?
If you are concerned about a genetic finding, you should consult with a medical professional, such as a reproductive endocrinologist or a genetic counselor. They can provide context based on your specific health history and guide you through any necessary clinical evaluations.
Sources & further reading
Educational information only, last refreshed 10/16/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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This synonymous variant in the gonadotropin-releasing hormone receptor gene is studied for its potential role in modulating reproductive hormone responsiveness.
Pathogenic missense substitution (p.Arg262Gln) in GNRHR linked to autosomal recessive normosmic congenital hypogonadotropic hypogonadism.
Gonadotropin-releasing hormone receptor variant associated with altered gonadotropin pulsatility and susceptibility to delayed puberty.
Recessive pathogenic missense variant in gonadotropin-releasing hormone receptor causing normosmic idiopathic hypogonadotropic hypogonadism and delayed puberty.
A missense variant (p.Gln106Arg) in the gonadotropin-releasing hormone receptor associated with normosmic congenital hypogonadotropic hypogonadism.
Common missense variant (p.Gln106Arg) in the gonadotropin-releasing hormone receptor associated with hypogonadotropic hypogonadism and delayed puberty when compound heterozygous.