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FISH for Pre-implantation Genetic Diagnosis
07:34

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Published on: February 23, 2011

Prenatal genetic counseling and consanguinity.

Angela Posch1, Stephanie Springer, Martin Langer

  • 1Department of Obstetrics and Feto-maternal Medicine, Medical University of Vienna, Austria.

Prenatal Diagnosis
|September 19, 2012
PubMed
Summary

Consanguineous unions are more common in prenatal genetic counseling patients than previously estimated, particularly among younger individuals and immigrants. These findings highlight the need for tailored counseling strategies for this demographic.

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Area of Science:

  • Medical Genetics
  • Reproductive Health
  • Public Health

Background:

  • Consanguinity, defined as unions between related individuals, can increase the risk of autosomal recessive disorders.
  • Understanding the prevalence and characteristics of consanguineous unions in genetic counseling settings is crucial for accurate risk assessment and management.

Purpose of the Study:

  • To determine the prevalence of consanguinity among patients seeking prenatal genetic counseling in Western Europe.
  • To characterize the demographic and health-related features of these consanguineous patients.

Main Methods:

  • A retrospective analysis was conducted on 1964 primary consultations at a prenatal genetic counseling clinic in Vienna, Austria.
  • Consanguineous patients were identified and compared to a control group of non-related unions based on demographic and clinical data.

Main Results:

  • 8.9% of patients were in consanguineous unions (second cousin or closer), with first cousins being the most common relationship.
  • Consanguineous patients were significantly younger and more likely to have a non-Austrian background compared to controls.
  • Family history of consanguinity was the primary reason for counseling in over 30% of cases.

Conclusions:

  • The prevalence of consanguinity in prenatal genetic counseling patients is higher than general population estimates in Western Europe.
  • Counseling strategies should account for the younger age and immigrant background frequently observed in consanguineous patient groups.
  • These findings underscore the importance of considering consanguinity in prenatal genetic risk assessments.