Here is some good information on coccidia:
Coccidia
Most likely your female will not give coccidia to her puppies unless she was already infected. Coccidia is hard to find in the stool if the patient is not having an outbreak (diarrhea). Your puppy could come back with a clean stool sample but could still be carrying coccidia. If your momma dog had coccidia as a puppy then she too could also carry coccidia and pass it to her puppies. It is hard to break the cycle once it starts.