Genetic counselling constitutes a communication process dealing with human problems associated with the occurrence or risk of occurrence of a genetic disorder in a family.
It involves helping people understand and adapt to the medical, psychological, and familial implications of genetic contributions to disease.
The process integrates the interpretation of family and medical histories to assess disease occurrence or recurrence risks.
It encompasses education regarding inheritance, testing, management, prevention, available resources, and research.
Counselling aims to promote informed choices and psychological adaptation to the genetic risk or condition.
Primary Goals
Ensure accurate diagnosis and precise risk assessment.
Provide complete and unbiased information to the family.
Facilitate informed and autonomous decision-making.
Deliver psychological support and facilitate adaptation to the genetic condition.
Prevent disease recurrence where possible and promote family and community health.
Core Ethical Principles
Autonomy and Non-Directiveness
Autonomy dictates respect for the right of the individual or family to make their own informed choices without any coercion.
Non-directiveness represents the core distinguishing feature from standard medical consultations.
The counsellor provides facts and outlines available options but strictly avoids advising or directing decisions.
Choices regarding reproduction are left entirely to the family to decide what aligns with their values.
Beneficence and Non-Maleficence
Beneficence requires acting in the best interest of the patient and family by providing accurate information and support.
Non-maleficence involves avoiding harm, including psychological distress, stigmatisation, or the delivery of inaccurate information.
Justice, Confidentiality, and Veracity
Justice ensures equitable access to counselling services regardless of socioeconomic status, caste, religion, or geography.
Confidentiality requires strict protection of genetic information, which must only be shared with explicit consent, except in rare cases of immediate harm.
Veracity ensures truthful, complete, and up-to-date disclosure of facts, including clinical uncertainties and testing limitations.
Fidelity involves maintaining trust and providing continuous follow-up support.
Stepwise Process of Genetic Counselling
Rapport and Diagnosis
Establishing rapport and contracting involves introducing the counsellor’s role, clarifying expectations, and assessing the family’s understanding, cultural beliefs, and psychosocial concerns.
Diagnosis confirmation requires reviewing medical records, clinical examinations, and laboratory or genetic test results using updated guidelines.
Pedigree and Risk Assessment
Pedigree construction requires drawing a minimum three-generation family tree using standard symbols, documenting consanguinity, miscarriages, stillbirths, neonatal deaths, and variable expressivity.
Risk assessment determines the specific mode of inheritance, such as autosomal dominant, autosomal recessive, X-linked, mitochondrial, or multifactorial.
Recurrence risks are calculated using Mendelian probabilities, Bayesian analysis, or empiric risks.
Modifiers such as incomplete penetrance, variable expressivity, anticipation, genomic imprinting, and heteroplasmy are discussed.
Education and Psychosocial Support
Education involves explaining the natural history, prognosis, and management options in simple, non-technical language utilizing visual aids and diagrams.
Genetic testing options are discussed, encompassing diagnostic, carrier, predictive, prenatal, and preimplantation genetic testing.
Counsellors address testing limitations, including incomplete penetrance, variants of uncertain significance, and test sensitivity.
Psychosocial assessment explores emotions like guilt, blame, grief, anxiety, and depression using empathetic listening.
Cultural, religious, and family dynamics are addressed, and referrals to psychologists or psychiatrists are made if required.
Reproductive Options and Follow-Up
Discussion of reproductive options covers natural conception with prenatal diagnosis, preimplantation genetic testing, gamete donation, adoption, and non-invasive prenatal testing.
Follow-up and documentation require summarising the session in a detailed letter provided to the family and referring physician.
The counsellor arranges necessary follow-up sessions, cascade testing of relatives, and referrals to support groups while maintaining detailed and confidential records.
Indications for Genetic Counselling
Confirmed or suspected chromosomal, single-gene, mitochondrial, or multifactorial disorders.
Family history of recurrent miscarriages, stillbirths, congenital anomalies, intellectual disability, metabolic disease, or sudden infant death.
Abnormal prenatal screening or diagnostic test results, or identification of fetal malformations by ultrasonography during pregnancy.
Consanguineous marriage, significant teratogen exposure, or advanced parental age.
Carrier screening in high-risk ethnic groups, cancer predisposition syndromes presenting in childhood, or newborn screening abnormalities.
