DENND1A rs2479102: Understanding This Reproductive Genetic Variant
The rs2479102 variant is a single nucleotide polymorphism located within the DENND1A gene, which has been studied for its potential link to polycystic ovary syndrome (PCOS). While some research has investigated this variant, current evidence suggests it lacks a significant correlation with PCOS in several studied populations.
What each genotype means
Typical risk profile
You carry two copies of the C allele at this locus, which represents the standard background genetic variation in this region of the DENND1A gene. Research studies have not identified an increased statistical association with polycystic ovary syndrome (PCOS) for this baseline genotype. Because PCOS is a multifactorial condition influenced by many genes and environmental factors, this result reflects only a baseline risk profile at this specific position.
Carried by approximately 81% of individuals of European ancestry and roughly 52% of individuals of East Asian ancestry.
Modestly elevated PCOS susceptibility
You carry one copy of the T risk allele for rs2479102 in the DENND1A gene. Genome-wide association research has linked this allele to a modest statistical increase in susceptibility to polycystic ovary syndrome (PCOS), though evidence across different ethnic groups remains limited and mixed. Carrying this single copy does not indicate a diagnosis of PCOS, as complex reproductive traits are shaped by many combined genetic and lifestyle influences.
Carried by approximately 18% of people of European ancestry and about 40% of people of East Asian ancestry.
Elevated PCOS susceptibility
You carry two copies of the T risk allele in the DENND1A gene, which has been associated with increased susceptibility to polycystic ovary syndrome (PCOS) in population genetics studies. However, the strength of this association varies among different populations, and overall clinical evidence for this specific variant remains limited. Having this genotype is a statistical risk factor and does not mean you have or will develop PCOS.
Carried by roughly 1% of individuals of European descent and approximately 8% of individuals of East Asian descent.
What is rs2479102?
The rs2479102 variant is a specific change in the DNA sequence, known as a single nucleotide polymorphism (SNP), located within the DENND1A gene. SNPs are the most common type of genetic variation among people, representing a difference in a single building block of DNA, called a nucleotide. In the context of genomics, researchers track these variants to see if they correlate with specific health traits or conditions. The rs2479102 variant sits on chromosome 9. Because it is located in a region of the genome that has been heavily scrutinized for its role in reproductive health, it has been included in various association studies. However, identifying a variant does not automatically mean it causes a condition; it simply marks a specific location in the genetic code that scientists compare between individuals with and without a particular trait.
The Role of the DENND1A Gene
The DENND1A gene provides instructions for making a protein that plays a role in intracellular trafficking, which is the process by which cells move materials to their correct locations. This protein is involved in clathrin-mediated endocytosis, a mechanism cells use to internalize molecules from their environment. In the context of reproductive health, research has suggested that DENND1A may influence androgen biosynthesis, the process by which the body produces hormones like testosterone. Because elevated androgen levels are a hallmark of polycystic ovary syndrome (PCOS), the gene has become a primary candidate for researchers investigating the genetic underpinnings of the condition. Studies using cell models have indicated that altering DENND1A expression can impact testosterone production, highlighting its potential biological relevance to hormonal regulation in the ovaries and adrenal glands.
Research and Evidence Strength
The evidence linking rs2479102 to PCOS is considered limited and inconsistent across different populations. While some early studies explored this variant as a potential marker for PCOS susceptibility, subsequent research has often failed to find a statistically significant association. For instance, studies focusing on Chinese Han women have explicitly reported that while other variants in the DENND1A gene may show correlations, rs2479102 does not appear to be significantly linked to the condition in that population. Because genetic associations can be highly dependent on ancestry and environmental factors, a finding in one group does not necessarily replicate in another. Consequently, rs2479102 is not currently considered a robust diagnostic marker for PCOS. Researchers continue to study the broader DENND1A locus to better understand how complex genetic interactions contribute to reproductive health.
Understanding Your Genetic Information
It is important to understand that genetic variants like rs2479102 are common and do not function as a medical diagnosis. Having a specific genotype at this location does not mean an individual will develop a condition, nor does the absence of a variant guarantee protection. PCOS is a complex, multifactorial condition influenced by a combination of genetic, hormonal, and lifestyle factors. If you have concerns about your reproductive health, hormonal balance, or family history, the most effective approach is to consult with a healthcare provider or a reproductive endocrinologist. They can provide clinical evaluations, such as blood tests and physical exams, which are far more informative than individual SNP data. Never use genetic information to make decisions about medication or treatment; always discuss your health goals and any genetic test results with a qualified medical professional.
How common is this variant?
The minor allele frequency for rs2479102 is approximately 0.28 in East Asian populations and approximately 0.10 in European populations.
Frequently asked questions
Does having the rs2479102 variant mean I have PCOS?
No. This variant is not a diagnostic tool for PCOS. PCOS is a complex condition diagnosed by clinicians based on specific clinical criteria, not by the presence of a single genetic variant.
Why do studies show different results for this variant?
Genetic associations often vary between different ethnic groups due to differences in genetic background and environmental factors. A variant that appears linked to a trait in one population may not show the same association in another.
Should I get tested for this SNP?
There is no clinical utility in testing for this specific SNP for the purpose of diagnosing or managing PCOS. Clinical diagnosis relies on established medical guidelines rather than individual genetic markers.
What should I do if I am worried about my risk for PCOS?
If you have concerns about your reproductive health, you should schedule an appointment with a healthcare provider. They can perform the necessary clinical assessments to provide an accurate evaluation.
Sources & further reading
Educational information only, last refreshed 10/21/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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Intronic variant in DENND1A associated with PCOS susceptibility; evidence suggests population-specific effects with inconsistent replication across European and Asian cohorts.
Prominent susceptibility locus within DENND1A linked across global GWAS cohorts to ovarian theca cell hyperfunction, hyperandrogenism, and polycystic ovary syndrome (PCOS).
This variant in the DENND1A gene is associated with the development of polycystic ovary syndrome (PCOS) and abnormal hormone levels.