Project Biotech
ECLIPSES Study: Iron and Fetal Growth
When your iron levels are high, your baby is more likely to have smaller bones and a lower birth weight compared to the average.
Test your knowledge
Based on the ECLIPSES study, what was the main finding regarding high levels of maternal iron (measured by serum ferritin) during pregnancy and fetal growth?</h2> <div id="options" class="options"> <ul> <li class="option">A) High maternal iron levels are associated with reduced fetal growth until birth.</li> <li class="option">B) Low maternal iron levels are the only factor that significantly impacts fetal growth.</li> <li class="option">C) Maternal iron levels have no measurable association with fetal growth during pregnancy.</li> <li class="option">D) High maternal iron levels are associated with increased fetal growth.</li> </ul>
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Published June 06, 2026
The science, explained
The study found that high levels of maternal serum ferritin (a marker for iron status) during pregnancy were associated with reduced fetal biometrics, such as estimated fetal weight and femur length, by the time of birth.