[William Clayton Journal] I asked the President w[h]ether children who die in infancy will grow. He answered "no, we shall receive them precisely in the same state as they died i.e. no larger. They will have as much intelligence as we shall but shall always remain separate and single. They will have no increase. Children who are born dead will have full grown bodies being made up by the resurrection."
[Source: George D. Smith, An Intimate Chronicle; The Journals of William Clayton, Signature Books in association with Smith Research Associates, Salt Lake City, 1995, http://amzn.to/william-clayton]