GNRHR rs104894340: Understanding Reproductive Genetic Variants
The rs104894340 variant is a specific genetic change located within the GNRHR gene, which plays a critical role in the human reproductive system. It is recognized in clinical databases as a pathogenic variant associated with autosomal recessive delayed puberty and idiopathic hypogonadotropic hypogonadism.
What each genotype means
Typical GNRHR function
This genotype represents the most common, wild-type sequence for this position in the GNRHR gene. Individuals with this genotype do not carry the specific pathogenic variant associated with autosomal recessive hypogonadotropic hypogonadism at this site.
This is the predominant genotype found in the vast majority of the global population.
Carrier of rare variant
This genotype indicates you carry one copy of the variant associated with GNRHR-related hypogonadotropic hypogonadism. Because this condition is typically inherited in an autosomal recessive pattern, carrying a single copy is generally not expected to cause the clinical features of the disorder, though you should consult with a genetic counselor regarding family planning.
This genotype is extremely rare, appearing in a very small fraction of the population according to gnomAD data.
Potential GNRHR deficiency
This genotype indicates you carry two copies of the variant, which is documented in clinical literature as a loss-of-function mutation linked to idiopathic hypogonadotropic hypogonadism. Individuals with this genotype may experience delayed puberty or infertility due to impaired GnRH receptor signaling; please discuss these findings with an endocrinologist or clinical geneticist.
This genotype is exceptionally rare and is not observed in the vast majority of population databases.
Understanding the GNRHR Gene
The GNRHR gene provides instructions for creating the gonadotropin-releasing hormone receptor, a protein found primarily in the pituitary gland. This receptor is a vital component of the hypothalamic-pituitary-gonadal axis, the system that regulates human sexual development and reproductive function. When the hormone GnRH binds to this receptor, it triggers the release of other hormones that stimulate the gonads to produce sex steroids. Because this pathway is essential for the onset of puberty and the maintenance of fertility, any significant disruption in the structure or function of the GNRHR protein can lead to challenges in reproductive development. Research into this gene helps scientists understand the complex biological signaling required for normal sexual maturation and hormonal balance.
What is the rs104894340 Variant?
The rs104894340 variant is a specific alteration in the DNA sequence of the GNRHR gene. In genomics, an rsID (reference SNP cluster ID) acts as a unique identifier for a specific location in the genome where a variation may occur. This particular variant is categorized as pathogenic in clinical settings, meaning it has been documented in medical literature as a cause of specific health conditions when inherited in a certain pattern. It is specifically linked to idiopathic hypogonadotropic hypogonadism, a condition where the body fails to produce enough of the hormones necessary for puberty. Because this variant affects the receptor's ability to function, it can prevent the body from responding correctly to the signals that initiate reproductive development, leading to symptoms like delayed puberty or infertility.
Clinical Associations and Evidence
Scientific research has established a link between mutations in GNRHR and various reproductive phenotypes. The evidence for rs104894340 is considered moderate, primarily derived from clinical studies of patients presenting with delayed puberty or hypogonadotropic hypogonadism. These studies often observe that the condition follows an autosomal recessive inheritance pattern, meaning an individual typically needs to inherit the variant from both parents to experience the associated clinical symptoms. While these findings are significant for understanding the genetic basis of reproductive disorders, it is important to note that the spectrum of symptoms can vary widely between individuals. Not everyone with a specific genetic variant will experience the same clinical outcome, as other genetic and environmental factors often influence how these conditions manifest in the real world.
Interpreting Your Genetic Information
If you have encountered this variant in a genetic report, it is essential to understand that this information is for educational purposes and does not constitute a medical diagnosis. Genetic variants are only one piece of a much larger biological puzzle. If you are concerned about reproductive health, puberty, or fertility, the most appropriate step is to consult with a qualified healthcare provider, such as a reproductive endocrinologist or a genetic counselor. They can provide context based on your personal and family medical history, perform necessary clinical evaluations, and discuss whether further testing is appropriate. Never make changes to your health management or medication based solely on a genetic report without professional guidance, as clinical decisions must always be based on a comprehensive assessment of your overall health.
How common is this variant?
The rs104894340 variant is extremely rare in the general population, as documented in large-scale genomic databases like gnomAD.
Frequently asked questions
What is idiopathic hypogonadotropic hypogonadism?
It is a condition characterized by a failure to undergo puberty due to low levels of sex hormones and gonadotropins. It occurs when the body's signaling pathway for reproductive hormones is disrupted.
Is this variant a diagnosis?
No, a genetic variant is not a diagnosis. It is a piece of information that should be interpreted by a medical professional in the context of your physical symptoms and medical history.
Can I be a carrier of this variant?
Yes, if you have one copy of the variant, you are considered a carrier. In autosomal recessive conditions, carriers typically do not show symptoms but can pass the variant to their children.
Where can I learn more about my reproductive health?
You should speak with a reproductive endocrinologist or a genetic counselor. They can provide personalized information based on your specific health needs and family history.
Sources & further reading
Educational information only, last refreshed 9/22/2026. 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.