AUTHOR=Kumsa Henok , Mislu Esuyawkal , Arage Mulugeta Wodaje , Abate Biruk Beletew , Beriye Moges , Mehari Reda Mihretab , Yimer Nigus Bililign TITLE=Effects of calcium supplementation on the prevention of preeclampsia: an umbrella review of systematic reviews and meta-analyses JOURNAL=Frontiers in Medicine VOLUME=12 YEAR=2025 URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2025.1434416 DOI=10.3389/fmed.2025.1434416 ISSN=2296-858X