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Related Experiment Videos

Selection against genetic defects in semen donors.

P E Smith

    Clinical Genetics
    |August 1, 1984
    PubMed
    Summary

    Donor selection for artificial insemination can reduce offspring

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    Area of Science:

    • Genetics
    • Reproductive Medicine
    • Public Health

    Background:

    • Artificial insemination donor selection necessitates predicting the likelihood of a donor fathering healthy offspring.
    • Assessing genetic risks for potential offspring is crucial in donor screening.
    • Existing methods for evaluating donor suitability require refinement to account for a wider range of hereditary disorders.

    Purpose of the Study:

    • To develop and apply methods for calculating "offspring excess recurrence risk" (delta R) for hereditary anomalies.
    • To assign an "affliction burden" (Bt) to various disorders to quantify their impact.
    • To establish criteria for donor rejection based on individual or combined genetic risks and disease burdens.

    Main Methods:

    • Calculated delta R for 38 disorders using published family and population data.
    • Assigned Bt values through a small survey.
    • Computed "offspring excess burden expectation" (delta RBt) for each disorder.

    Main Results:

    • Identified specific disorders (e.g., cataract, Parkinson disease, schizophrenia) with high delta RBt, making them sufficient cause for donor rejection.
    • Established that combinations of lesser defects can also exceed acceptable risk limits.
    • Determined that a limit on Bt is necessary due to the intolerable burden of certain infrequent disorders (e.g., Tay-Sachs disease, cystic fibrosis).

    Conclusions:

    • Careful donor selection can significantly reduce the average total hereditary burden in offspring.
    • The study provides a quantitative framework for assessing and managing genetic risks in artificial insemination.
    • Selection strategies can mitigate risks associated with both common and late-onset hereditary disorders.

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