PRLR rs1604428: Understanding the Genetic Link to PCOS
The rs1604428 variant is a specific genetic change located within the PRLR gene, which encodes the prolactin receptor. Research has identified this variant as a potential risk factor for polycystic ovary syndrome (PCOS) and has explored its possible connection to the increased risk of depression in affected individuals.
What each genotype means
Increased PCOS and depression risk
Research indicates that the C allele of this variant is associated with an increased risk for polycystic ovary syndrome (PCOS) and depression in certain populations. This genotype may contribute to the observed comorbidity between these conditions, though the exact biological mechanism remains under investigation. Please consult with a healthcare provider to discuss your overall health profile and any concerns regarding these conditions.
Specific population frequency data for this genotype is not currently established in large-scale public databases.
Intermediate risk profile
This genotype contains one copy of the risk-associated C allele. While the C allele has been linked to increased risk for PCOS and depression in research studies, the presence of the T allele may modify this association. Further clinical research is required to fully understand the impact of this specific combination on individual health outcomes.
Specific population frequency data for this genotype is not currently established in large-scale public databases.
Baseline risk profile
This genotype does not carry the C allele identified in research as a risk factor for PCOS and depression. Individuals with this genotype are considered to have a baseline risk profile regarding this specific genetic variant. As with all genetic findings, this should be viewed in the context of your overall health and family history.
Specific population frequency data for this genotype is not currently established in large-scale public databases.
What is the rs1604428 Variant?
The rs1604428 variant is a single nucleotide polymorphism (SNP) located within the PRLR gene. In genetics, a SNP represents a variation at a single position in the DNA sequence among individuals. This specific variant is classified as intronic, meaning it resides within an intron—a non-coding region of the gene that is removed during the process of creating a functional protein. While intronic variants do not change the protein sequence directly, they can influence how a gene is regulated, expressed, or spliced. Scientists study these variants to understand how subtle changes in our genetic code might contribute to complex health conditions. Because rs1604428 is located in a region that may influence the activity of the prolactin receptor, researchers are investigating whether it alters the body's hormonal signaling pathways in ways that predispose individuals to certain reproductive health challenges.
The Role of the PRLR Gene
The PRLR gene provides instructions for making the prolactin receptor, a protein found on the surface of cells throughout the body. This receptor is essential for responding to prolactin, a hormone primarily known for its role in milk production, but which also plays a critical part in reproductive health, immune system function, and metabolism. In the ovaries, prolactin signaling is involved in maintaining normal cycles and supporting fertility. When the PRLR gene functions correctly, it helps ensure that hormonal signals are transmitted effectively. Disruptions in this signaling pathway, whether through genetic variation or other factors, can lead to imbalances. For example, studies in animal models have shown that the absence of functional prolactin receptors can result in irregular reproductive cycles and subfertility. Understanding the PRLR gene is therefore vital for grasping how hormonal regulation impacts overall reproductive well-being.
Research Associations and Evidence
Current research, including studies published in the Journal of Ovarian Research, has identified a significant association between the rs1604428 variant and the risk of polycystic ovary syndrome (PCOS). In a study of Italian families, researchers observed that this variant was linked to PCOS under specific recessive genetic models. Furthermore, the same risk allele has been investigated for its potential role in the higher prevalence of depression observed in women with PCOS. While these findings are compelling, the evidence is currently considered moderate. It is important to note that PCOS is a complex, multifactorial condition influenced by a combination of genetic, environmental, and lifestyle factors. A single genetic variant like rs1604428 is unlikely to be the sole cause of the condition. Further functional studies are required to fully elucidate the biological mechanisms by which this variant might influence disease risk.
Interpreting Your Genetic Information
If you have information about your genotype for rs1604428, it is important to view it within the context of your overall health. Genetic associations are statistical observations made across large groups of people and do not serve as a medical diagnosis for any individual. Having a specific genotype does not guarantee that you will develop a condition, nor does the absence of a risk allele guarantee protection. Because PCOS is a complex syndrome, clinical diagnosis is based on a combination of symptoms, hormone levels, and physical examinations conducted by a healthcare professional. You should never use genetic data to make medical decisions or change your health management without consulting a doctor. If you have concerns about your reproductive health, hormonal balance, or mental well-being, please discuss these topics with a qualified clinician who can provide personalized guidance based on your full medical history.
How common is this variant?
Specific population frequency data for the rs1604428 variant is not widely documented in large-scale public databases. Current research on this variant has primarily focused on specific cohorts, such as Italian families, and further studies are needed to determine its prevalence across diverse global ancestries.
Frequently asked questions
Does having the rs1604428 variant mean I have PCOS?
No, having this variant does not mean you have PCOS. Genetic variants are only one of many factors that contribute to the development of complex conditions, and a diagnosis of PCOS is made by a doctor based on clinical criteria, not genetic testing alone.
Can I use this information to prevent PCOS?
There is no evidence that knowing your genotype for this variant can be used to prevent PCOS. Because the condition is multifactorial, focus on maintaining a healthy lifestyle and consulting with a healthcare provider for any reproductive health concerns.
Is this variant linked to other health conditions?
Research has explored a potential link between this variant and an increased risk of depression in women with PCOS. However, these associations are complex and require more research to fully understand the underlying biological connections.
Should I get tested for this SNP?
Routine testing for this SNP is not currently recommended for clinical practice. Genetic testing for complex conditions like PCOS is generally not useful for individual health management and should be discussed with a genetic counselor or physician if you have specific concerns.
Sources & further reading
Educational information only, last refreshed 10/10/2026. Not medical advice — these associations describe population statistics, not individual predictions.
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