parental consanguinity
A relationship between parents who share common ancestors, increasing the risk of autosomal recessive disorders in their offspring.
Full Definition
Parental consanguinity refers to a genetic relationship between reproductive partners who share one or more common ancestors, making them genetically related to some degree. Common examples include first cousins, second cousins, or uncle-niece relationships. Consanguineous marriages increase the probability that offspring will inherit identical copies of recessive gene variants from both parents, significantly raising the risk of autosomal recessive genetic disorders. This information is crucial for genetic counseling and may influence reproductive decision-making.
Usage
Usage note: Preferred over the standalone term 'consanguinity' when discussing reproductive risks.
In Context
- "The genetic counselor noted parental consanguinity and recommended expanded carrier screening for recessive conditions." — Preconception counseling session
- "Parental consanguinity was identified as a risk factor for the rare autosomal recessive disorder in this family." — Clinical genetics evaluation