Complex sentence: Most newborn screening tests are done by measuring metabolites and enzyme activity in whole blood samples collected on specialized filter paper, however many areas are starting to screen infants for hearing loss using automated auditory brainstem response and congenital heart defects using pulse oximetry.
Split into simpler sentences: Most newborn screening tests are done by measuring metabolites and enzyme activity in whole blood samples collected on specialized filter paper. Many areas are starting to screen infants for hearing loss using automated auditory brainstem response and congenital heart defects using pulse oximetry.