Why Is the Rh-Positive Firstborn of an Rh-Negative Mother Unaffected

question 40

Multiple Choice

Why is the Rh-positive firstborn of an Rh-negative mother unaffected by Rh hemolytic disease of the fetus and newborn (Rh HDFN) ?

• A) The plasma volume of the mother is tripled during the first pregnancy which dilutes anti-D.
• B) The titer of anti-D is too low to cause destruction of fetal antigens.
• C) The mother has not been immunized to the D antigen before placental separation.
• D) None of the above

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Definitions:

Hierarchical Structure

The organization of power and authority in a family.

Power

The ability or capacity to direct or influence the behavior of others or the course of events.

Cutoff

A predetermined point or limit beyond which something does not proceed or is not allowed.

Disengaged

lacking interest, involvement, or commitment; often used to describe students or employees who are not actively participating.