They layed eggs like many other dinosaurs, and the egg's shell consisted of different layers, a calcite structure, and pore canals (Carpenter 1999). ... Stegosaurus eggs hatched around 3kg, and in adulthood the dinosaurs could have weighed up to 5 tons.

How many eggs did Stegosaurus lay?

The nest, which was about 80 million years old, consisted of at least 20 eggs arranged in a circle. But what was most remarkable was the eight-foot-long ostrichlike adult that was uncovered with them.

Do dinosaur eggs exist?

As far as we know, all dinosaurs reproduced by laying eggs, as do most other sauropsids (reptiles). It is very difficult to determine what species of dinosaur laid the eggs that have been discovered, because only a few dinosaur embryos have been found inside the fossil eggs.