Exceptionally preserved eggs and embryos reveal the life history of a pterosaur

The pterosaur record is generally poor, and pterosaur eggs are even rarer. Only a handful of isolated occurrences of eggs and embryos have been reported so far. Three-dimensionally preserved eggs include one from Argentina and five reported from the Turpan-Hami Basin, Xinjiang, northwestern China in 2014. - HeritageDaily - Archaeology News

Dinosaur embryo fossils reveal life inside the egg - BBC News

Extended embryo retention and viviparity in the first amniotes

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A perfectly preserved, rare baby dinosaur egg discovered in China

See fossilized dinosaur eggs, babies

Fossil confiscated in police raid is one of the most complete

Perfectly preserved, 'extremely rare' dinosaur embryo in egg found

Conserved in-ovo cranial ossification sequences of extant saurians

Exceptionally Preserved Eggs and Embryos Reveal the Life History

Pterosaurs: A brief flight with these remarkable reptiles