How many puppies does a dog usually have on its first birth?

There's no single answer to this! The number of puppies a dog has in her first litter can vary greatly depending on factors like:

* Breed: Some breeds are known for having larger litters than others.

* Age: First-time mothers often have smaller litters than dogs who have given birth before.

* Overall health: A dog's health can influence litter size.

* Genetics: Just like humans, dogs inherit traits, and litter size can be influenced by genetics.

Generally speaking, a first-time mother dog could have anywhere from 1 to 12 puppies in her litter. It's a big range!

If you're curious about a specific breed, you can do some research online or talk to a veterinarian.