FSHB rs10830497: Reproductive Lifespan and Hormone Variation
The rs10830497 variant is a single-nucleotide polymorphism located upstream of the FSHB gene on chromosome 11. Genome-wide association studies link variation at this locus with differences in circulating follicle-stimulating hormone levels, female reproductive lifespan, and age at menarche. The evidence remains statistical and limited, meaning it reflects slight population-level shifts rather than a diagnostic indicator for individual reproductive health.
What each genotype means
Typical FSH expression
You carry two copies of the common C allele upstream of the FSHB gene. Research indicates this genotype is associated with baseline circulating follicle-stimulating hormone (FSH) concentrations and typical timing for reproductive lifespan milestones. These statistical findings reflect broad population patterns and do not predict individual fertility or reproductive health outcomes.
Carried by approximately 70% to 75% of individuals of European ancestry and is the predominant genotype across most global populations.
Moderately altered FSH levels
You carry one copy of the minor T allele near the FSHB gene. Genome-wide studies show this allele is correlated with slightly lower circulating FSH levels, subtle shifts in menstrual cycle length, and modest differences in reproductive timing. The evidence for clinical impact is limited and represents modest statistical associations rather than a direct health determinant.
Found in roughly 25% of individuals of European descent, with varying frequencies across other ancestral groups.
Reduced FSH trait association
You carry two copies of the minor T allele near the FSHB locus. In research cohorts, this genotype has been associated with lower circulating FSH concentrations, longer menstrual cycles, and slightly later age at natural menopause. Because current scientific evidence remains limited and observational, these population-level tendencies do not diagnose or predict specific reproductive disorders.
Carried by approximately 2% to 3% of individuals of European ancestry and is relatively uncommon globally.
Genomic Context and Variant Location
The single-nucleotide polymorphism rs10830497 is positioned on the short arm of chromosome 11 at 11p14.1, upstream of the follicle-stimulating hormone subunit beta (FSHB) gene. It consists of a single base-pair change, alternating between the reference cytosine (C) allele and the alternate thymine (T) allele according to standard genomic builds. Because rs10830497 resides in a non-coding intergenic or regulatory region flanking FSHB, it does not directly alter the amino acid sequence of any protein. Instead, variants in this genomic region are studied for their potential regulatory roles, including how they might alter transcription factor binding or influence the expression rates of the neighboring FSHB gene. This locus sits within a broader genomic neighborhood that exhibits high linkage disequilibrium in specific populations, often co-inherited with other well-studied regulatory single-nucleotide polymorphisms near the FSHB transcriptional start site.
The Biological Function of FSHB
The FSHB gene encodes the beta subunit of follicle-stimulating hormone (FSH), an essential pituitary glycoprotein hormone. Active FSH functions as a heterodimer composed of a common alpha subunit (shared with luteinizing hormone, thyroid-stimulating hormone, and human chorionic gonadotropin) joined noncovalently to the hormone-specific beta subunit encoded by FSHB. The beta subunit is what dictates receptor binding specificity and biological activity. In females, FSH stimulates the maturation of ovarian follicles and prompts granulosa cells to synthesize estrogens, regulating the menstrual cycle. In males, FSH acts on Sertoli cells in the testes to support spermatogenesis. Severe loss-of-function disruptions in FSHB lead to isolated gonadotropin deficiency and hypogonadism. Subtle genetic changes near FSHB, however, alter transcriptional activity only modestly, resulting in minor shifts in circulating baseline gonadotropin levels rather than complete loss of reproductive endocrinology.
Current Research and Strength of Evidence
Large-scale genome-wide association studies (GWAS) have identified signals across the 11p14.1 locus near FSHB associated with circulating gonadotropin levels, timing of menarche, natural age at menopause, and traits like spontaneous dizygotic twinning. While several studies spotlight the promoter polymorphism rs10835638, rs10830497 has emerged in reproductive lifespan scans as a marker tagging endocrine variation. The current scientific evidence for rs10830497 specifically is classified as limited. Although the statistical associations across reproductive traits achieve genome-wide significance in pooled cohorts, individual effect sizes are modest, shifting physiological markers by fractions of a standard deviation or reproductive timing by a few weeks or months. Most published research has been conducted in cohorts of European ancestry, meaning the findings may not generalize equally across diverse global ancestries where linkage patterns differ.
Clinical Limitations and What You Can Do
Genotype status at rs10830497 cannot diagnose infertility, polycystic ovary syndrome, or primary ovarian insufficiency, nor can it predict the exact timing of menopause or menarche. Common complex traits are shaped by hundreds of genetic variants interacting with nutrition, general health, lifestyle, and environmental factors. Individuals who learn their genotype should view it strictly as general biological context regarding endocrine variation. If you are experiencing irregular menstrual cycles, difficulty conceiving, or symptoms related to hormonal transitions, clinical blood tests—such as serum FSH, estradiol, and anti-Müllerian hormone (AMH)—remain the standard evaluation methods. Genotype data should never replace professional medical evaluation, and any concerns regarding reproductive health or hormonal medication should be discussed directly with an endocrinologist or reproductive specialist.
How common is this variant?
The minor T allele of rs10830497 has a frequency of approximately 0.15 in European populations, meaning around 25% to 30% of individuals in these cohorts carry at least one copy, while frequencies vary across non-European ancestral groups.
Frequently asked questions
Can rs10830497 predict when I will start menopause?
No, this genetic variant cannot predict your age at menopause. While research links it to small statistical differences in reproductive lifespan across broad populations, individual onset is influenced by hundreds of genetic factors, environmental exposures, and lifestyle elements.
Does having the T allele cause female infertility?
No, having the T allele does not cause infertility. The variant is a common genetic marker with a subtle regulatory effect, not a pathogenic mutation that disrupts normal reproduction or guarantees fertility problems.
How does rs10830497 relate to other FSHB variants?
rs10830497 is situated upstream of the FSHB gene and exists in linkage disequilibrium with other nearby regulatory markers, such as the widely studied promoter SNP rs10835638. These markers are often inherited together as part of shared ancestral haplotypes.
Does this genetic variant affect men's health?
Because the FSHB gene is essential for follicle-stimulating hormone production in both sexes, variations at this locus can influence FSH concentrations and aspects of testicular function in men. However, the majority of large GWAS discovery efforts for this specific variant have focused on female reproductive markers.
Sources & further reading
Educational information only, last refreshed 9/12/2026. 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.
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.
Variant in the promoter region of FSHB associated with altered follicle-stimulating hormone levels, timing of menarche, and female reproductive lifespan.