It was probably warm-blooded and may have given birth to live young.

They give birth to live young approximately every 23 days.

They also lay eggs, like a bird, instead of giving birth to live young.

They give birth to live young, between six to a record 20 per litter.

They gave birth to live young, just as the Ichthyosaurs had done.

Almost all mammals give birth to live young, but there are a few that lay eggs.

The females of the species give birth to live young.

They give birth to live young; 20 to 40 baby snakes are born at one time.

Mammals give birth to live young because the development takes place internally.

In some they lack eggs and give birth to live young.