ADGRG2 helps control fluid balance in parts of the reproductive tract in people assigned male at birth, which supports sperm transport and fertility. This gene plays an important role in keeping the small ducts near the testes working normally. If the ADGRG2 gene does not work properly, some people may have little or no sperm in the semen because sperm cannot move through these ducts as expected. Pathogenic variants in this gene are linked to some inherited forms of male infertility, especially obstructive azoospermia.
What is a gene?
Genes are stretches of DNA that carry instructions your cells use to make molecules or regulate activities in the body. Some genes provide the directions for producing proteins, which are the parts of cells that do much of the work. Others mostly help decide when certain processes happen, where they take place, and how active they are. Taken together, genes affect how the body grows and works, and they can influence how you respond to food, stress, and medications. For a deeper look at this topic, you can find more in LearnHub.
Overview
ADGRG2Gene function
What if the gene works
The ADGRG2 gene helps control fluid balance in parts of the male reproductive tract. This supports sperm transport and male fertility.
Risk
What if the gene does not work
In males, variants in the ADGRG2 gene can cause blocked sperm transport with congenital absence of the vas deferens and infertility; milder or more severe variants may influence how much transport is affected.
Treatment
What does that mean for your treatment
For a pathogenic or loss-of-function variant in the ADGRG2 gene, no ADGRG2-specific treatment or management approach is currently established. Care is guided by the person’s fertility findings and may include standard options such as sperm retrieval and assisted reproduction, rather than a treatment chosen because of the ADGRG2 gene itself.
Conditions associated with ADGRG2
Gene function
What if the gene works
In the male reproductive tract, the ADGRG2 gene helps tissues manage fluid and cell signals in a controlled way. Its protein works at the cell surface, where it receives outside cues and turns them into internal messages. This steady activity supports the normal environment needed for sperm to move through nearby ducts.
Its protein sits on the cell surface and picks up signals from the space around the cell. It then passes those messages inward so the cell can adjust its activity in an organized way.
In the male reproductive tract, this gene helps certain duct cells move fluid back into the body. This part of the ADGRG2 gene function supports sperm transport by keeping the fluid around sperm at the right level.
ADGRG2 activity helps maintain the normal working environment in the ducts that carry sperm early in their journey. This supports sperm concentration and smooth passage toward the epididymis, where sperm continue to mature.
What is a variant?
A genetic variant is a small change in the DNA sequence within a gene. These changes are common and are part of normal human diversity, such as differences in appearance, metabolism, or the way the body responds to environmental influences. Many variants do not have any noticeable effect and simply represent natural genetic variation. In some situations, though, a variant can change a gene’s function more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the ADGRG2 gene can alter the receptor protein’s shape, shorten it, or disrupt how it is processed, so less of it reaches the cell surface or it signals poorly once there. Milder changes may leave some activity intact, while more severe variants can cause near-complete loss of function. These effects help explain how variants in the ADGRG2 gene affect male fertility and why some people develop clearer obstructive infertility features, including congenital absence of the vas deferens.
How variants are linked to conditions
Pathogenic variants in the ADGRG2 gene can cause X linked congenital bilateral absence of the vas deferens, a form of obstructive azoospermia linked to male infertility. In many affected people, ADGRG2 gene variants and congenital bilateral absence of the vas deferens are identified during an infertility evaluation after no sperm are found in semen. This is a well-established gene-condition link in human genetics.
A variant is not necessarily a diagnosis
Variants in genes are a routine feature of human biology and are widespread across the general population. Most do not directly affect health and instead reflect normal human variation. For many genes, having a variant associated with a condition points to a possible link rather than a certain diagnosis, particularly when the picture also involves multiple genes and environmental influences. In some situations, though, one well characterized variant in a particular gene is enough to establish the diagnosis.
Are there things that can increase or change my risk?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the ADGRG2 gene. In people with a disease-causing change in ADGRG2, the main effect is usually tied to the variant itself rather than lifestyle or environmental factors. Anyone concerned about personal or family risk can speak with a doctor or genetic counselor.
Inheritance of ADGRG2 variants
ADGRG2-related conditions are usually inherited in an X-linked pattern, which helps explain how ADGRG2 gene variants are inherited in families. Because the ADGRG2 gene is on the X chromosome, males who inherit a disease-causing variant are more likely to be affected, while females with one changed copy are often carriers and may have no symptoms. A mother carrying the variant can pass it to sons and daughters, while an affected father passes his X chromosome to all daughters and not to his sons.
What does my ADGRG2 result mean for my family?
For ADGRG2, the main family pattern is X-linked. This often means male relatives on the mother’s side could also be affected, while female relatives may carry the changed gene without having the same fertility problems. In families with an ADGRG2 result, siblings and other close relatives may also want to learn whether they carry the same change.
Genetic information
Genetic testing
How you find out about variants
To look for changes in the ADGRG2 gene, labs use a blood sample or cheek swab and read the gene’s DNA sequence. ADGRG2 genetic testing can identify variants linked to some forms of congenital absence of the vas deferens and may classify a finding as benign, uncertain, or disease causing.
When should I consider getting a genetic test?
If a man has infertility because the tubes that carry sperm are missing on both sides, testing the ADGRG2 gene may help explain why. It can also be worth considering when similar male infertility runs in the family, especially after more common causes have already been ruled out.
A genetic result is only one part of your health story
Genetic results can provide useful insight, although how much they reveal depends on the condition and on the kind of variant involved. How the body works over time is also shaped by many factors, including lifestyle, environment, age, and medical history. For some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is best understood together with other parts of care. In other situations, a genetic result may give a clear answer. In areas such as medication response, these results can also help put individual experiences into context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Two people can take the same treatment, yet one may get the intended benefit while the other may notice less effect or more side effects. One reason is that inherited differences can change how the body breaks down, moves, or responds to a drug. This kind of variation is common and can influence how well a medicine works or how sensitive someone is to it.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can affect the way a person responds to medication. It focuses on connections between genes and drugs to help explain why the same treatment can work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can support treatment decisions that are more informed and more individualized. More detail on this topic is available in the LearnHub.
Drugs influenced by the ADGRG2 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding how medicines are chosen or used. Questions about side effects, new symptoms, or fertility concerns are best discussed with your doctor.
History
ADGRG2 entered the scientific literature in the late 1990s, when researchers identified it as an orphan receptor and gave it earlier names including HE6 and GPR64. Initially understood only through visible traits, later recognized as tied to a specific gene, it drew growing interest in reproductive genetics and X linked patterns of inherited infertility. From these first observations, research expanded steadily, and studies in the 2000s helped connect variants in the ADGRG2 gene with congenital bilateral absence of the vas deferens, a cause of some cases of male infertility. As gene naming systems became more consistent, the receptor was reassigned to the adhesion G protein coupled receptor family and renamed the ADGRG2 gene. That change reflected a broader effort in genetics to group related genes in a clearer, more standardized way.