NR5A1 rs2229765: Understanding This Reproductive Genetic Variant
The rs2229765 variant is a specific change within the NR5A1 gene, which provides instructions for a protein critical to human reproductive and adrenal development. This variant has been studied for its potential associations with differences in sex development and primary ovarian insufficiency.
What each genotype means
Typical NR5A1 genotype
This is the most common genotype for this variant in the general population. It is considered the reference sequence, meaning it does not carry the specific variant associated with the reproductive conditions described in the catalog.
This is the predominant genotype found in the vast majority of individuals across all global populations.
Heterozygous variant carrier
Carrying one copy of this variant may be associated with a range of reproductive phenotypes, including differences of sex development or primary ovarian insufficiency. Because NR5A1 variants can show variable expressivity, the presence of this genotype does not guarantee a specific clinical outcome, and individuals should consult with a genetic counselor or reproductive specialist to understand its relevance to their personal health history.
This genotype is rare, occurring at a frequency consistent with the reported minor allele frequency of approximately 0.1% in gnomAD.
Homozygous variant carrier
This genotype indicates that both copies of the gene carry the variant. Research into NR5A1 indicates that functional impairment of the SF-1 protein can lead to significant reproductive and endocrine differences, though the severity of these effects can vary widely between individuals. Please discuss these findings with a healthcare provider to determine if further clinical evaluation is appropriate.
This genotype is extremely rare in the general population.
What is the rs2229765 Variant?
The rs2229765 variant is a single nucleotide polymorphism (SNP) located within the NR5A1 gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. The NR5A1 gene is situated on chromosome 9 and encodes a protein known as steroidogenic factor 1 (SF-1). This protein acts as a transcription factor, meaning it helps turn other genes on or off by binding to specific regions of DNA. Because SF-1 is essential for the development of the adrenal glands and the gonads (testes and ovaries), variations in the gene that encodes it can potentially alter how these organs form or function. Researchers track variants like rs2229765 to understand how subtle changes in our genetic code might contribute to the wide spectrum of human reproductive health and development.
The Role of the NR5A1 Gene
The NR5A1 gene is a master regulator of endocrine development. The protein it produces, SF-1, is required for the formation of the adrenal glands and the gonads during embryonic development. It functions by binding to the promoter regions of various genes involved in steroid hormone production, such as those responsible for creating sex hormones. By regulating these pathways, SF-1 ensures that reproductive tissues develop correctly and maintain their function throughout life. When the NR5A1 gene is disrupted, it can lead to a range of clinical presentations. These include 46,XY differences of sex development (DSD), where individuals may have gonadal dysgenesis or undervirilization, as well as 46,XX primary ovarian insufficiency, where the ovaries stop functioning as expected before the age of 40. The gene's influence is profound, as it sits at the top of a complex hierarchy of signaling pathways that dictate sexual differentiation.
Research and Clinical Associations
Scientific research has established NR5A1 as a significant gene in the study of reproductive health. Variants in this gene are frequently investigated in the context of both 46,XY DSD and premature ovarian failure. While some variants in NR5A1 are clearly pathogenic and directly cause these conditions, the clinical significance of specific SNPs like rs2229765 can be more nuanced. Evidence for many variants in this gene is considered moderate, as the clinical impact can vary significantly between individuals, even those with the same genetic change. This variability suggests that other genetic, epigenetic, or environmental factors likely interact with NR5A1 to determine the final clinical outcome. Current research continues to map how these variants influence the WNT signaling pathway and other mechanisms essential for ovarian and testicular differentiation, helping clinicians better understand the genetic architecture of reproductive disorders.
What You Can Do With This Information
Genetic information regarding variants like rs2229765 is primarily intended for educational and research purposes. It is important to recognize that the presence of a specific genotype does not constitute a medical diagnosis. Reproductive health is complex and influenced by many factors beyond a single genetic variant. If you have concerns about your reproductive health, fertility, or family history, the most appropriate step is to consult with a healthcare professional, such as a reproductive endocrinologist or a certified genetic counselor. These experts can provide context based on your personal health history and clinical symptoms. They can also determine if further diagnostic testing is warranted. Avoid making health decisions based solely on raw genetic data, as clinical interpretation requires a comprehensive evaluation of your overall health and medical background.
How common is this variant?
The rs2229765 variant is relatively rare, with a minor allele frequency (MAF) of approximately 0.001 in the gnomAD database, indicating it is not common in the general population.
Frequently asked questions
Is rs2229765 a cause of infertility?
While variants in the NR5A1 gene are associated with reproductive conditions like primary ovarian insufficiency and gonadal dysgenesis, rs2229765 is just one of many factors. Infertility is a complex condition, and you should speak with a fertility specialist to understand your specific situation.
Should I get tested for NR5A1 variants?
Genetic testing for NR5A1 is typically reserved for individuals with specific clinical symptoms, such as unexplained differences in sex development or premature ovarian failure. It is not a routine test for the general population.
Can I change my risk associated with this variant?
You cannot change your genetic sequence. However, understanding your genetic background can help you and your doctor make informed decisions about your reproductive health and monitoring.
Where can I find more information on NR5A1?
Reliable sources for genetic information include MedlinePlus Genetics, the NCBI Gene database, and peer-reviewed medical journals found on PubMed. Always prioritize information from established medical and scientific institutions.
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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