Hadrosaur eggs, including those containing embryos, have been discovered in Late Cretaceous rock formations in China, notably in Jiangxi Province and the Xixia Basin of Henan Province.

These eggs provide insights into hadrosaurid development and reproductive strategies, revealing a range of sizes and structures depending on the species and its stage of development.

The findings from these Chinese fossils have also contributed to the understanding of the global distribution of Hadrosaurid eggs and the potential decline of dinosaur populations before their extinction.