Hedgehog ligands are a group of signaling molecules that play a critical role in various developmental processes. These molecules are part of the larger Hedgehog (Hh) signaling pathway, which is essential for embryonic development and tissue regeneration. Hedgehog ligands include three main types in vertebrates: Sonic hedgehog (Shh), Indian hedgehog (Ihh), and Desert hedgehog (Dhh).
