Sorry but breeding is a very hot topic.
It is not something that on shouls think about unless they know their dog and their dog history.Where her parents OFA'd (not just x-rayed).Do you know the line well enough to insure stable temperments and not hip,elbow,heart,thyriod,eye or VWD problems.No dog should be bred unless it can first prove it self in the ring,and the obed ring.There is not a Rottweiler alive that should be bred with some sort of performance title.
Other wise you are breeding for your self and not the betterment of the breed.
The reason there is rescue is because people think they have a good pet and their friends want one ,then their friends want on and it just land slides.
It you deside that you are going to breed your pet anyway.Please sell all pups on a spay neuter contract.Do not trust anyone just because they say they will.stop the cycle here.