Why Do Rh-Negative but Not Rh-Positive Mothers Sometimes Have Babies

question 43

Multiple Choice

Why do Rh-negative but not Rh-positive mothers sometimes have babies with hemolytic disease of the newborn?

• A) This disease results when an Rh-negative mother's immune system is primed to produce anti-Rh IgG antibodies that can cross the placenta. If the mother is Rh-positive, she won't produce any anti-Rh antibodies at all.
• B) Rh-positive mothers produce IgM antibody, not IgG. Even although they make anti-Rh antibody, IgM antibody can't cross the placenta, so it can't cause hemolytic disease of the newborn.
• C) Rh-positive mothers will receive a preventative shot from their physician prior to conception. This will provide the protection the fetus needs AFTER conception to avoid the disease.
• D) Rh-negativity is also associated with hyperproduction of antibodies. As such, Rh-negative mothers are more likely than Rh-positive mothers to produce the antibodies needed to produce this disease.
• E) This disease results when an Rh-positive mother's immune system is primed to produce anti-Rh IgG antibodies that can cross the placenta. If the mother is Rh-negative, she won't produce any anti-Rh antibodies at all.

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Definitions:

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A faction of American politicians within the Republican Party of the United States from about 1854 until the end of Reconstruction in 1877, who believed in the immediate emancipation of the slaves and harsh repercussions for the Southern states.

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Delayed

Postponed or made later than originally planned or expected.