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Lecithin–sphingomyelin ratio

test of fetal amniotic fluid to assess for fetal lung immaturity

Pronunciation
/ˈlɛsəθən – ˌsfɪŋɡoʊˈmaɪələn ˈreɪʃiˌoʊ/
/ˈlɛsɪθɪn – ˌsfɪŋɡəʊˈmʌɪəlɪn ˈreɪʃɪəʊ/
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