recurrence risk
Probability that a genetic condition will occur again in future pregnancies or family members. Central concept in genetic counseling.
Full Definition
The statistical likelihood that a genetic condition will manifest again in future pregnancies within the same family or in other family members, expressed as a percentage or ratio. Recurrence risk calculations depend on the underlying genetic mechanism, inheritance pattern, penetrance, and family history. For mendelian disorders, recurrence risks are often straightforward (e.g., 25% for autosomal recessive conditions when both parents are carriers), while complex or multifactorial conditions may have empirically derived risks based on population studies. Accurate recurrence risk assessment is fundamental to genetic counseling and reproductive decision-making.
Usage
Usage note: Always provide both numerical and contextual explanations when discussing recurrence risks with patients.
In Context
- "The genetic counselor explained that the recurrence risk for spina bifida in subsequent pregnancies was approximately 3-5%." — Genetic counseling session
- "Recurrence risk calculations must account for both the genetic mechanism and family-specific factors." — Clinical genetics training manual