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Related Experiment Videos

Rh isoimmunization during pregnancy: antenatal prophylaxis

J M Bowman, B Chown, M Lewis

    Canadian Medical Association Journal
    |March 18, 1978
    PubMed
    Summary

    Rh isoimmunization affects 1.8% of Rh-negative women. Antenatal administration of Rh immune globulin (RhIG) effectively prevents this condition, reducing residual cases significantly.

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    Area of Science:

    • Obstetrics and Gynecology
    • Immunology
    • Perinatal Medicine

    Background:

    • Rh isoimmunization remains a concern in Rh-negative women despite postpartum Rh immune globulin (RhIG) administration.
    • Residual cases often stem from Rh isoimmunization occurring during pregnancy or shortly after delivery, which postpartum RhIG cannot prevent.

    Purpose of the Study:

    • To evaluate the effectiveness of antenatal Rh immune globulin (RhIG) prophylaxis in preventing Rh isoimmunization.
    • To determine if antenatal RhIG administration can reduce the incidence of Rh isoimmunization during pregnancy or within 3 days postpartum.

    Main Methods:

    • A clinical trial involving 1357 Rh-negative pregnant women carrying Rh-positive babies.
    • Antenatal Rh immune globulin (RhIG) was administered at 34 weeks' gestation, with subsequent trials at 28 and 34 weeks' gestation.

    Main Results:

    • The antenatal administration of Rh immune globulin (RhIG) was effective in preventing Rh isoimmunization.
    • No cases of Rh isoimmunization were observed during pregnancy or within 3 days postpartum in the treated group.

    Conclusions:

    • Antenatal prophylaxis with Rh immune globulin (RhIG) is essential for minimizing Rh isoimmunization.
    • Routine antenatal RhIG administration, particularly at 28 weeks' gestation, is recommended to further reduce incidence.

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