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Second trimester amniotic fluid glucose, uric acid, phosphate, potassium, and sodium concentrations in relation to maternal pre-pregnancy BMI and birth weight centiles.

TitleSecond trimester amniotic fluid glucose, uric acid, phosphate, potassium, and sodium concentrations in relation to maternal pre-pregnancy BMI and birth weight centiles.
Publication TypeJournal Article
Year of Publication2015
AuthorsFotiou, M., Michaelidou A. Maria, Athanasiadis A. P., Menexes G., Symeonidou M., Koulourida V., Ganidou M., Theodoridis T. D., & Tarlatzis B. C.
JournalJ Matern Fetal Neonatal Med
Volume28
Issue8
Pagination910-5
Date Published2015 May
ISSN1476-4954
KeywordsAdult, Amniotic Fluid, Biomarkers, Birth Weight, Body Mass Index, Female, Fetal Development, Gestational Age, Glucose, Humans, Infant, Newborn, Linear Models, Male, Phosphates, Potassium, Pregnancy, Pregnancy Trimester, Second, Sodium, Uric Acid
Abstract

OBJECTIVE: To study the evolution profile of amniotic fluid (AF) glucose, uric acid, phosphate, potassium, and sodium, in the second trimester of pregnancy, and explore the possible relations between the concentration of these components and maternal, as well as neonatal characteristics.METHODS: AF of 52 pregnant women was analyzed using an automatic multichannel analyzer. Maternal age, pre-pregnancy Body Mass Index (BMI), inter-pregnancy intervals, and smoking status were derived from questionnaires. Information on pregnancy and delivery was collected from medical records.RESULTS: Uric acid increased (r = 0.423, p < 0.01), while phosphate and glucose concentrations decreased during the period of 16-26th week of pregnancy (r = -0.590, p < 0.001 and r = -0.314, p < 0.05, respectively). Maternal pre-pregnancy BMI was significantly correlated with AF uric acid concentration (r = 0.460, p < 0.01) and marginally with AF glucose (r = 0.274, p = 0.052) and sodium (r = 0.254, p = 0.070) levels. Multiple linear regression indicated that mid-trimester AF uric acid and phosphate levels were significantly related to birth weight centiles (R(2)( )= 0.345, p < 0.05).CONCLUSIONS: Our results suggest that: (a) AF phosphate levels reflect gestational age to a satisfactory extent, (b) maternal pre-pregnancy BMI is significantly correlated with AF uric acid concentration, and (c) in appropriate for gestational age infants, AF phosphate and uric acid levels may serve as potential biomarkers of birth weight centiles. Further studies on AF composition may help to unravel the biochemical pathways underlying fetal development and could offer insight on the potential impact of maternal nutritional management on fetal growth regulation.

DOI10.3109/14767058.2014.937692
Alternate JournalJ. Matern. Fetal. Neonatal. Med.
PubMed ID25046579

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