Timeline of egg fossil research

[1] In 1859, the first scientifically documented dinosaur egg fossils were discovered in southern France by a Catholic priest and amateur naturalist named Father Jean-Jacques Poech, however he thought they were laid by giant birds.

The first scientifically recognized dinosaur egg fossils were discovered serendipitously in 1923 by an American Museum of Natural History crew while looking for evidence of early humans in Mongolia.

Egg discoveries continued to mount all over the world, leading to the development of multiple competing classification schemes.

Zhao's new method of egg classification was hindered from adoption by Western scientists due to language barriers.

However, in the early 1990s Russian paleontologist Konstantin Mikhailov brought attention to Zhao's work in the English language scientific literature.

Fossilized Dinosaur eggs displayed at Indroda Dinosaur and Fossil Park .
Hypselosaurus egg.
Fossilized nest specimen AMNH FR 6508, recovered from Mongolia during the Central Asiatic Expedition of 1923.
Reconstruction of a Maiasaura nest with eggs
Pectinatites .