In my own opinion, breeding is something you do to better the breed, and it should be done with a program. How many other aussies do you have? Are they ALL tested? Aussies are prone to dysplasia, eye problems, ear problems...etc. Have you done all the nessecary and even unessecary testing? Are they certified? Are they pedigreed? Registered? Do atleast some of them fit a standard? Are atleast some of them working quality? Are they participants of any sports? Are you willing to risk her life? Are you willing to give her an emergency C-section that might kill her or the pups? Do you have an emergency vet? What kind of diet are they on? Are their temperments good?

Considering I'm sure that you only have one dog...I guess the answers to these questions won't be answered very well.