2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4539Star-forming regions have been the targets of X-ray observations since the dawn of satellite X-ray astronomy. The increase in sensitivity and/or spatial resolution offered by XMM-Newton and Chandra allows a dramatic improvement, both qualitative and quantitative, on our knowledge of high-energy phenomena in these regions and the underlying physical processes. We summarize here some recent developments: the Orion Nebula Cluster and its 1000+ stellar X-ray sources; Herbig-Haro objects and their high-speed shocks; protostars, brown dwarfs and their unusual magnetic activity; and the discovery of diffuse X-ray emission from HII regions, presumably related to strong winds from massive stars. The role that future X-ray missions may play in the field is already starting to be visible.9 pages, 9 figures, to appear in "New Visions of the X-ray Universe in the XMM-Newton and Chandra Era" (ed. F. Jensen et al.), ESA SP-488Astrophysicstext