I'm with Spiritwind. I don't understand it. I honestly don't see any advantages to this unless a dog just cannot handle surgery.

When you talk about using this while a puppy matures. Until you decide if it is show/breeding quality. Sounds like a waste of time and money. If you can't wait until a year old to make you decision you shouldn't be breeding dogs. Some breeds don't even get their first heat until after 12 months.