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Related Experiment Videos

Rh sensitization after genetic amniocentesis.

L M Hill, L D Platt, B Kellogg

    Obstetrics and Gynecology
    |October 1, 1980
    PubMed
    Summary

    Rh-negative women undergoing genetic amniocentesis without prophylaxis showed a 5.4% Rh sensitization rate. A 150-microgram Rh-immune globulin dose is recommended to prevent fetal Rh immunization.

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    Area of Science:

    • Obstetrics and Gynecology
    • Immunology
    • Genetics

    Background:

    • Rh-negative status in pregnant women poses a risk for Rh sensitization.
    • Genetic amniocentesis is a procedure that can potentially lead to fetomaternal hemorrhage.
    • Lack of Rh-immune globulin prophylaxis during amniocentesis in Rh-negative women requires careful risk assessment.

    Purpose of the Study:

    • To evaluate the rate of Rh sensitization in Rh-negative women after genetic amniocentesis without Rh-immune globulin prophylaxis.
    • To compare the sensitization rate with spontaneous Rh immunization incidence.
    • To determine the necessity and optimal dosage of Rh-immune globulin prophylaxis.

    Main Methods:

    • Retrospective evaluation of 78 Rh-negative women.
    • Analysis of Rh sensitization incidence in patients undergoing genetic amniocentesis.
    • Comparison with historical data on spontaneous Rh immunization.

    Main Results:

    • Three out of 56 (5.4%) at-risk patients became sensitized.
    • The sensitization rate was not statistically different from the spontaneous incidence (2.1%).
    • A trend suggested increased sensitization after second-trimester amniocentesis.

    Conclusions:

    • Rh sensitization can occur after genetic amniocentesis without prophylaxis.
    • A 150-microgram dose of Rh-immune globulin is recommended for Rh-negative women undergoing genetic amniocentesis.
    • Prophylaxis is crucial to prevent fetal Rh immunization, especially in the second trimester.

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