Please, please do not breed your dog. I understand that it is tempting for many people to breed their dog because they think their dog is beautiful and has a great personality. Unfortunately this isn't a good enough reason to breed a dog. Yes, there are some genetic tests available, but there are a number of diseases out there for which reliable testing is not yet available.
There is much more that goes into reputable breeding that you clearly aren't trained in (and I don't mean that as a bad thing....I'm not either, but I would never breed any dog at my current level of experience). Unless you are a very experienced person who has worked closely training with reputable breeders (people who have dogs with champion conformation titles, and also have experience in at least one of the other fields such as obedience, agility, herding, etc...) then it is irresponsible to bring more puppies into the world.
The only excuse for breeding when there are millions of animals laying around in shelters and many being killed every day would be that you are experienced and certain that you will be contributing to the health and temperament of the breed.