I would not do a natural, some people might do it, but we don't, too easy for the male to over heat. You can do an AI cheaper than surgicals, but we have better success with surgicals. The price differs from vet to vet, you will just have to talk to your vet, plus find a vet that is familiar with Frenchies, especially when it comes time to do the C-section, if not you could loose both mom and pups.