Abstract
Amniotic fluid is the product of many substances and fetal urine is considered to be one of the principal components. Only a few reports have been published describing the concentration of microglobulins and urinary enzymes in the amniotic fluid. We determined the levels of alpha 1-m, beta 2-m, AAP and NAG, in 154 samples of amniotic fluid (103 early determinations and 51 late determinations) as a function of gestational age. We observed a statistically significant decrease in concentration of alpha 1-m ( P < 0.001), beta 2-m ( P < 0.01) and AAP ( P < 0.001) when early and late amniotic fluid samples were compared. A statistically significant increase of NAG ( P < 0.01) and creatinine ( P < 0.01) was also found. A significant correlation was observed between alpha 1-m and beta 2-m, and between AAP and NAG, respectively. The potential role of urinary enzyme and microglobulin determination in amniotic fluid as an index of fetal kidney development, is discussed.
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