Amniotic-fluid bilirubin serves as an important indicator of hemolytic disease in the developing fetus.Which of the following laboratory techniques is used to measure amniotic-fluid bilirubin levels?

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Spectrophotometry is used to measure amniotic-fluid bilirubin.The higher the ΔA₄₅₀, the more severe the hemolytic disease relative to the gestational age of the pregnancy.In general, a decreasing amniotic-fluid bilirubin trend is a good prognostic indicator that a fetus will survive, whereas a horizontal or rising bilirubin level indicates more severe hemolytic disease.

Amniotic-Fluid Bilirubin Serves as an Important Indicator of Hemolytic Disease