The Shape of Things by Ray Bradbury

He did not want to be the father of a small blue pyramid. Peter Horn hadn’t planned it that way at all. Neither he nor his wife imagined that such a thing could happen to them. They had talked quietly for days about the birth of their coming child, they had eaten normal foods, slept a great deal, taken in a few shows, and, when it was time for her to fly in the helicopter to the hospital, her husband, Peter Horn, laughed and kissed her. “Honey, you’ll be home in six hours,” he said. Famous last words...