Fry and the cessation of breeding, pepps and conmon bn.

Hey peeps and Doug just reading up more on breeding and i think you said in your book keeping fry with the parents will slow down their breeding. Just wondering if you can give more detail on this. As i have a few different tracks systems with racks sharing same water can having the fry in the same circulated water as the parents cause them to stop breeding? Is it a chemical thing or is it just the hassle of having annoying babies in the tank that puts them off? I have say 200 pepp fry in my breeding talks in fry savers will this affect the parents with spawning. Thanks