Do all animals that give birth to live young warm blooded?

No, not all animals that give birth to live young are warm-blooded. While mammals, which are typically warm-blooded (endothermic), give birth to live young, some reptiles and fish also exhibit live birth but are cold-blooded (ectothermic). For instance, certain species of snakes and sharks can give birth to live young without being warm-blooded. Therefore, the ability to give live birth is not exclusive to warm-blooded animals.