Well if the dog is not aggressive then one can let him be around. Usually breeders do not let the male dog around when the female dog is having puppies. Anyway it would be best to let the female dog find a cozy spot to give birth with minimum of trouble and as such it would be a good idea to leave her alone without anyone, man or dog around.
Even in the wild it is the female dog that is mainly concerned in rearing the puppies and as such the male dog has little or no role to play other than hunting prey and perhaps protecting the puppies if need be from any harm. In fact in some species the female dog after the birth of the puppies generally does not allow the male dog to come near the puppies. Also it would be a good idea to take pet insurance especially if your dog is going to give birth as it would provide cover for any expenses accrued due to the dog and the puppies.
Even in the wild it is the female dog that is mainly concerned in rearing the puppies and as such the male dog has little or no role to play other than hunting prey and perhaps protecting the puppies if need be from any harm. In fact in some species the female dog after the birth of the puppies generally does not allow the male dog to come near the puppies. Also it would be a good idea to take pet insurance especially if your dog is going to give birth as it would provide cover for any expenses accrued due to the dog and the puppies.