Veiledowner is correct, her life will be shortened if she is bred often. And unfortunetly she might lay infertile eggs which will still take her life down. Although you can avoid her developing eggs, keep the temps lower, dont feed her alot and dont ever show her to a male.
If you want to breed her then for the time you make the temps higher, feed a bit more (with alot more calcium) and let her breed with a male.
Then when she has laid you must give her alot of protein to build up her strength and get her normal and healthy again, after a few weeks of recovery, change back to the normal feeding and lower temps.
It works for me but I dont know if it will work for you, it all depends on the conditions