google helps, i think
.com also wrote a guide as well iirc.
essentially, the characteristics of your egg are generated when the egg is created and handed to you by the day care man. so if you know the ivs of your parent mons, ex: all 0s for the mother and all 1s from the dad, if the baby mon comes out having 0/31/1/0/1/0 that means the ivs inherited are
mom/31/dad/mom/dad/mom. so we would know which ivs came from which parents, and that the random stat is 31. knowing this, i can soft reset my game and back up my save knowing the next egg i get will have those stats, allowing me to have a lot of control over my offsprings characteristics. if you have more questions pm me