SPAY YOUR DOG! She'll stay healthy that way. Like the other said, enjoy your dog. You want to risk her life like that? She could die giving birth, and get ovarian cancer if not spayed.
Go to an animal shelter. Look at the dogs. Say bye, because some wont make it, and its all because of people breeding there dogs for the cute little pups. Think puppies are cute? What about dead puppies? Still cute?