Dallin H. Oaks
"Resurrection is much more than merely reuniting a spirit to a body held captive by the grave. We know from the Book of Mormon that the resurrection is a restoration that brings back 'carnal for carnal' and 'good for that which is good (Alma 41:13)." (Conference Report, Apr. 2000, May Ensign, p. 15)
“What About the Resurrection of Little Children?”
"Joseph Smith declared that the mother who laid down her little child, being deprived of the privilege, the joy, and the satisfaction of bringing it up to manhood or womanhood in this world, would after the resurrection, have all the joy, satisfaction and pleasure, and even more than it would have been possible to have had in mortality, in seeing her child grow to the full measure of the stature of its spirit. If this be true, and I believe it, what a consolation it is ... It matters not whether these tabernacles mature in this world, or have to wait and mature in the world to come, according to the word of the Prophet Joseph Smith, the body will develop, either in time or in eternity, to the full stature of the spirit, and when the mother is deprived of the pleasure and joy of rearing her babe to manhood or womanhood in this life, through the hand of death, that privilege will be renewed to her hereafter, and she will enjoy it to a fuller fruition than it would be possible for her to do here. When she does it there, it will be with certain knowledge that the results will be without failure; whereas here, the results are unknown until after we have passed the test.
"Children will come forth from the grave as children, be raised to maturity by worthy parents, and be entitled to receive all of the ordinances of salvation that eventuate in the everlasting continuation of the family unit." (Robert Millet, Joseph Fielding McConkie, The Life Beyond, pp. 118-9)
Joseph F. Smith
"Joseph Smith taught the doctrine that the infant child that was laid away in death would come up in the resurrection as a child; and, pointing to the mother of a lifeless child, he said to her: 'You will have the joy, the pleasure, and satisfaction of nurturing this child, after its resurrection, until it reaches the full stature of its spirit.' There is restitution, there is growth, there is development, after the resurrection from death. I love this truth. It speaks volumes of happiness, of joy and gratitude to my soul. Thank the Lord he has revealed these principles to us." (Gospel Doctrine, p. 455)