It's important to remember that "medium-sized" is a relative term. To determine if a dog is capable of giving birth, it's more important to know:
* Breed: Some breeds are known for having large litters, while others typically have smaller litters.
* Individual Dog's Size: Even within a breed, individual dogs can vary in size.
* Age: Younger dogs tend to have smaller litters than older dogs.
If you are concerned about a specific dog's ability to give birth, it's always best to consult a veterinarian. They can assess the dog's health and give you the best advice for her care.