Ethics and society in medical genetics
Genetic information is predictive, shared with relatives and permanent; that raises questions of consent, privacy, discrimination and fairness.
Key facts
- The four principles of biomedical ethics apply: respect for autonomy, beneficence, non-maleficence and justice.
- Predictive testing of children for adult-onset conditions without childhood treatment (such as Huntington disease) is usually deferred until they can decide for themselves; testing is offered when it changes care in childhood (familial adenomatous polyposis, MEN2).
- Secondary findings: genome sequencing can reveal actionable variants unrelated to the reason for testing; patients should choose beforehand whether to learn them.
- Genetic results concern relatives too; when a clinician may warn at-risk relatives without consent is debated, and the usual approach is to support the patient in informing them.
- Genetic discrimination by insurers or employers is a real concern; some countries forbid it by law (in the United States, for health insurance and employment).
In detail
- Genomic data can be re-identified even when names are removed, and consumer genetic tests share data under commercial terms.
- Large databases and artificial intelligence improve diagnosis but raise questions about consent, ownership and bias towards well-studied populations.
- Eugenics, the attempt to «improve» populations by controlling reproduction, led in the twentieth century to forced sterilisations and murder; modern genetics insists on individual, informed choice.
- Equity: access to genetic testing and therapies is unequal between and within countries.
- Also called
- Genetic privacy and discrimination, Predictive testing of children and secondary findings
Clinical notes
- Before a genomic test, discuss what will and will not be reported, uncertain results, secondary findings and implications for family members.
- Adolescents should take part in decisions about their own testing as far as their maturity allows.
Test yourself
Think of the answer, then tap the question to see it.
Why is predictive testing for Huntington disease usually deferred in children?
There is no treatment that changes childhood care, and testing would take away the child's own future choice.
What are secondary findings?
Actionable variants found by genome or exome sequencing that are unrelated to the reason for the test.
What lesson does the history of eugenics teach?
Reproductive decisions must stay individual and informed; coercion in the name of population genetics led to grave abuses.
Connections
Educational information, not medical advice. For any symptom, see a health professional.
Sources: What is genetic discrimination?: MedlinePlus Genetics (MedlinePlus, US National Library of Medicine, 2026); Genetic Discrimination (National Human Genome Research Institute (NHGRI), 2026); Eugenics (National Human Genome Research Institute (NHGRI), 2026); What are the ethical issues surrounding gene therapy?: MedlinePlus Genetics (MedlinePlus, US National Library of Medicine, 2026).
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Representative model, for educational purposes only.