Low Selenium Levels in Amniotic Fluid Correlate with Small-For-Gestational Age Newborns

Area of Science:

• Obstetrics and Gynecology
• Maternal-Fetal Medicine
• Nutritional Science

Background:

• Identifying risk factors for small-for-gestational-age (SGA) newborns is crucial in obstetrics.
• Previous research on the role of selenium (Se) in SGA development is inconclusive.
• This study investigates amniotic fluid Se concentrations as a potential indicator for SGA.

Purpose of the Study:

• To explore the role of selenium (Se) concentrations in amniotic fluid.
• To determine if amniotic fluid Se levels can predict the development of SGA newborns.
• To assess the association between Se levels and other pregnancy outcomes.

Main Methods:

• Prospective, single-center study involving 327 pregnant women.
• Amniotic fluid collected during amniocentesis at 16/17 weeks of gestation.
• Selenium concentrations measured using electrothermal atomic absorption spectrometry (ETAAS).

Main Results:

• Significantly lower mean amniotic fluid Se concentrations in women with SGA newborns compared to appropriate-for-gestational-age (AGA) newborns (4.8 ± 1.9 µg/L vs. 5.6 ± 2.5 µg/L, p=0.017).
• After adjusting for risk factors, Se remained the only significant predictor of SGA (b = -0.152, p < 0.048).
• Amniotic fluid Se levels did not correlate with pre-eclampsia or preterm delivery.

Conclusions:

• Amniotic fluid Se levels are a promising area for early identification of women at risk for SGA.
• Decreased Se levels in amniotic fluid are statistically associated with an increased chance of developing SGA.
• Further research is needed to understand the complex interplay between Se, other trace elements, and SGA development.