You can't inherit all the IVs, only 3 at most. The 3 stats inherited are random, unless you have one of the Power items, in which case you will inherit that specific stat and 2 random ones.
So if a parent holds the Power Bracer, the baby will inherit its Attack IV and two other random IV stats.
You said in your comment about using the same Hidden Power - unfortunately since you only inherit 3 stats you cannot guarantee the same type and base power of the HP attack.