ESR1 rs2234693: What Your Genotype Means
The rs2234693 variant is a common genetic change located within the ESR1 gene, which provides instructions for making the estrogen receptor alpha protein. This variant has been studied for its potential associations with bone mineral density, reproductive health, and susceptibility to certain hormone-related conditions.
What each genotype means
Potential increased disease susceptibility
Some research suggests this genotype may be associated with an increased risk for certain conditions, such as rheumatoid arthritis and related clinical manifestations like osteoporosis or high blood pressure. However, findings across different studies are mixed, and this variant is not consistently linked to estrogen receptor expression levels in all populations.
The frequency of this genotype varies significantly by ancestry and is commonly observed in many global populations.
Intermediate risk profile
This genotype represents a heterozygous state for the PvuII polymorphism in the ESR1 gene. Research into its clinical significance remains inconclusive, with some studies showing no clear association with estrogen receptor expression or specific disease outcomes, while others explore its role in reproductive health and bone density.
This is a common genotype found across diverse ethnic groups.
Baseline risk profile
This genotype is often used as a reference point in studies investigating the PvuII polymorphism. While some research has explored its potential role in breast cancer prognosis or bone mineral density, evidence is inconsistent and often varies by race, ethnicity, and specific clinical context.
This genotype is frequently observed in general population cohorts.
Understanding the rs2234693 Variant
The rs2234693 variant, historically referred to as the PvuII polymorphism, is a single nucleotide polymorphism (SNP) located in the first intron of the ESR1 gene. In genetics, an intron is a non-coding region of a gene that is removed during the process of creating a functional protein. However, variants within these regions can still influence how much of a protein is produced or how the gene is regulated. This specific SNP involves a substitution where a thymine (T) is replaced by a cytosine (C). Because it sits within a regulatory area of the gene, researchers have long investigated whether this change alters the expression or activity of the estrogen receptor alpha protein, which is essential for responding to estrogen throughout the body.
The Role of the ESR1 Gene
The ESR1 gene encodes the estrogen receptor alpha (ER-α), a nuclear receptor that acts as a transcription factor. When estrogen binds to this receptor, the complex moves into the cell nucleus and binds to specific DNA sequences to turn genes on or off. This process is fundamental to many physiological systems, including the development and maintenance of the reproductive system, bone health, and cardiovascular function. Because estrogen signaling is so widespread, variations in the ESR1 gene can theoretically have diverse effects. Scientists study these variants to understand why individuals may differ in their bone density, the timing of menopause, or their risk for conditions that are sensitive to estrogen levels, such as certain types of breast cancer.
Research Associations and Evidence Strength
Research into rs2234693 has produced a wide range of findings, leading to a moderate strength of evidence regarding its clinical impact. Numerous studies have explored its link to bone mineral density (BMD), with some reporting that the variant accounts for a portion of the variability in hip and femoral neck bone density. Additionally, the variant has been studied in the context of reproductive health, including associations with the age of natural menopause and premature ovarian failure. Some meta-analyses have also examined its potential role in breast cancer susceptibility, though results across different populations have been inconsistent. It is important to note that many of these associations are statistical in nature and may vary significantly based on a person's ancestry, environmental factors, and other genetic influences.
Population Frequency
The rs2234693 variant is considered a common polymorphism. In many Caucasian populations, the frequency of the T allele (often considered the wildtype) and the C allele are relatively balanced, with studies frequently reporting frequencies near 50% for each. Because it is a common variant, it is found in a large portion of the general population. However, allele frequencies can differ between ethnic groups, and researchers often observe that the distribution of these genotypes follows Hardy-Weinberg equilibrium in healthy populations. Because this is a common variant rather than a rare mutation, having a specific genotype is a normal part of human genetic diversity rather than an indicator of a specific disease state.
Interpreting Your Genetic Information
If you have received information about your rs2234693 genotype, it is important to view it as one small piece of a much larger biological puzzle. Genetic associations are rarely deterministic; they represent statistical trends observed in large groups of people, not individual medical predictions. You cannot use this information to diagnose a condition or predict your future health outcomes with certainty. If you are concerned about bone health, reproductive issues, or cancer risk, the most effective approach is to consult with a healthcare professional. They can evaluate your personal and family medical history, lifestyle factors, and clinical screenings to provide personalized guidance. Never make changes to your health regimen or medical care based solely on a genetic report without professional medical advice.
How common is this variant?
The rs2234693 variant is a common SNP with allele frequencies typically distributed near 50% for both the T and C alleles in many populations.
Frequently asked questions
Is rs2234693 a cause of breast cancer?
No, rs2234693 is not a direct cause of breast cancer. While some studies have explored statistical associations between this variant and breast cancer risk, the results have been inconsistent across different populations and it is not considered a diagnostic marker.
Does my rs2234693 genotype predict my bone density?
While some research suggests a statistical association between this variant and bone mineral density, it is not a predictive tool for an individual. Bone health is influenced by a complex combination of genetics, diet, exercise, and hormonal factors.
Should I change my diet based on my ESR1 genotype?
There is no evidence-based medical guidance to change your diet based on the rs2234693 variant. You should discuss any dietary or health changes with a registered dietitian or your primary care physician.
Is this variant related to menopause?
Some research has investigated a potential link between this variant and the age of natural menopause. However, these findings are based on population-level studies and cannot be used to predict the timing of menopause for any specific individual.
Sources & further reading
Educational information only, last refreshed 10/7/2026. Not medical advice — these associations describe population statistics, not individual predictions.
Curious what your genotype is for rs2234693?
Upload a raw DNA file from 23andMe, AncestryDNA, MyHeritage, or FamilyTreeDNA and see this variant — plus thousands more — interpreted in your full report.
Get my report — $29Related variants in ESR1
This variant in the estrogen receptor 1 gene is associated with an increased risk of endometriosis and may influence cognitive aging.
Estrogen receptor 1 variant associated with altered circulating estradiol levels, follicular maturation, and variability in age at natural menopause.
Variant in estrogen receptor 1 associated with variation in female reproductive timing, including age at menarche and natural menopause onset.
Common polymorphism in estrogen receptor alpha (ESR1) affecting target tissue responsiveness to estrogen, recurrent pregnancy loss risk, and bone-reproductive axis interactions.
Estrogen receptor 1 regulatory variant associated with variation in timing of menarche and bone density response to sex hormones.
Estrogen receptor 1 missense and intronic regulatory variation associated with ovarian responsiveness and fertilization rates in assisted reproductive technology.