FSHB rs148454792: Understanding This Reproductive Genetic Variant
The rs148454792 variant is a genetic change located within the FSHB gene, which provides instructions for making a subunit of the follicle-stimulating hormone. Research has investigated this variant in the context of spermatogenic impairment and variations in sperm counts, though its clinical impact remains a subject of ongoing study.
What each genotype means
Typical FSHB function
This genotype represents the most common form of the FSHB gene in the general population. Research indicates that individuals with this profile do not carry the specific variant associated with reduced FSHB transcriptional activity or the associated risks for spermatogenic impairment observed in some clinical studies.
This is the most common genotype found in the vast majority of the global population.
Potential reproductive variant carrier
You carry one copy of the variant associated with FSHB gene changes. Some research suggests that variants in this gene may be linked to spermatogenic impairment or abnormal sperm counts in certain populations, though the clinical significance can vary significantly between individuals. Please discuss these findings with a reproductive specialist or genetic counselor to understand how this relates to your personal health history.
This genotype is relatively uncommon, typically found in less than 1% of the general population.
Increased reproductive variant risk
You carry two copies of this variant, which has been identified in research as being associated with spermatogenic impairment and abnormal sperm counts in some clinical cohorts. Because this variant may influence FSH levels and reproductive function, it is recommended that you consult with a fertility specialist or endocrinologist to discuss your reproductive health and any necessary clinical evaluations.
This genotype is rare, occurring in a very small fraction of the population.
What is the rs148454792 Variant?
The rs148454792 variant is a specific single nucleotide polymorphism (SNP) found within the FSHB gene. In genetics, a SNP represents a variation at a single position in the DNA sequence. This particular variant is categorized as a missense mutation, meaning the change in the DNA sequence results in a different amino acid being incorporated into the protein produced by the gene. Because the FSHB gene is critical for the production of follicle-stimulating hormone (FSH), researchers are interested in how such structural changes might influence the hormone's function or production levels. While many genetic variants are common and have no observable effect on health, missense variants are often prioritized in research because they have the potential to alter the biological activity of the resulting protein.
The Role of the FSHB Gene
The FSHB gene encodes the beta subunit of follicle-stimulating hormone (FSH). FSH is a vital hormone produced by the pituitary gland that plays a central role in human reproduction. In males, FSH is essential for the development of the testes and the process of spermatogenesis, which is the production of sperm. In females, it is crucial for the regulation of the menstrual cycle and the growth of ovarian follicles. Because FSH is a heterodimer, it requires both an alpha subunit and a beta subunit to function correctly. Any genetic variation that affects the FSHB gene has the potential to influence the synthesis, secretion, or biological efficacy of the hormone. Understanding how variants like rs148454792 interact with this gene is a key area of reproductive endocrinology research.
Research and Clinical Associations
Current research into rs148454792 has explored its potential association with spermatogenic impairment and abnormal sperm counts. In the context of male infertility, studies often look for genetic markers that might explain why some individuals experience reduced sperm production. While some variants in the FSHB gene have been strongly linked to hormone levels and reproductive outcomes, the evidence for rs148454792 is considered moderate. It is important to note that reproductive health is a complex trait influenced by a combination of many genetic factors, environmental exposures, and lifestyle choices. Consequently, the presence of a single variant does not necessarily determine a clinical outcome. Researchers continue to use large-scale genomic studies to clarify the strength of these associations and to determine if this variant acts independently or in combination with other genetic markers.
Interpreting Your Genetic Information
If you have received information about your genotype for rs148454792, it is important to view it within the context of your overall health. Genetic testing results can be complex, and the presence of a variant does not constitute a medical diagnosis. Because this variant is associated with reproductive markers, individuals who are concerned about fertility or hormone levels should consult with a reproductive endocrinologist, urologist, or a certified genetic counselor. These professionals can help interpret results in light of your personal and family medical history. You should never use genetic data to make independent medical decisions or to alter any prescribed treatments. Always discuss your findings with a qualified healthcare provider who can provide personalized guidance based on clinical evidence and your specific health needs.
How common is this variant?
The rs148454792 variant is relatively rare, with a reported population frequency of less than 1%. Frequencies can vary significantly across different ancestral groups, and large-scale databases like gnomAD provide the most current estimates for specific populations.
Frequently asked questions
Does having this variant mean I am infertile?
No. Genetic variants are only one of many factors that influence fertility. Having a specific genotype does not diagnose infertility, and many people with various genetic profiles have normal reproductive health.
Should I get tested for this variant?
Genetic testing for specific variants is typically only recommended by a physician if there is a clinical reason, such as an investigation into unexplained infertility. You should discuss the necessity of such tests with a healthcare professional.
Can I change my genotype?
No, your genotype is determined at conception and cannot be changed. However, understanding your genetic profile can sometimes help doctors provide more tailored care or lifestyle recommendations.
Where can I find more information on FSHB variants?
You can search reputable databases like ClinVar or the GWAS Catalog for the latest research on specific SNPs. Always prioritize information from peer-reviewed medical journals and established health organizations.
Sources & further reading
Educational information only, last refreshed 10/28/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Promoter-adjacent variant linked to FSHB expression, influencing basal follicle-stimulating hormone levels, menstrual cycle duration, and twinning propensity.
Pathogenic loss-of-function variant causing isolated follicle-stimulating hormone deficiency leading to hypogonadotropic hypogonadism.
Functional promoter variant in FSHB influencing serum FSH concentrations and reproductive lifespan.
Variant in the promoter region of FSHB associated with circulating follicle-stimulating hormone levels, age at menarche, and reproductive lifespan.
Variant in the promoter region of FSHB associated with altered follicle-stimulating hormone levels, timing of menarche, and female reproductive lifespan.
Located in the promoter of FSHB (c.-211G>T), this variant downregulates follicle-stimulating hormone transcription and is strongly associated with male infertility traits (oligozoospermia) and altered female reproductive lifespan.