In many cases, during pregnancies of anti-D alloimmunized women, without antigenic stimulus, the anti-D concentration remains stable. We report here a case of a woman anti-D and anti-C alloimmunized which has presented high variation of anti-D concentration in her serum during two successive pregnancies with a Rh-negative fetus. Thus, the Liley Index only has confirmed the absence of fetal damage.
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