Fig. 12

Co-citation network of references in preeclampsia research. Each node represents a cited reference, with node size proportional to its citation frequency. Clusters of nodes indicate groups of references frequently cited together, reflecting shared research themes. Prominent references, such as Levine et al. (2004), Maynard et al. (2003), and Steegers et al. (2010), highlight foundational studies on key topics like angiogenic factors, oxidative stress, and hypertensive disorders in pregnancy. Lines between nodes show co-citation relationships, illustrating the interconnectedness of research within this field