India, Oct. 28 -- Parents are able to detect problems with their children before a report or a medical professional verifies them. And this is just what happened to Paul and Ashlee Higginbotham, who shared six children together. While they have witnessed the kids' illnesses and tantrums in the past, Austyn, their youngest daughter, did not feel healthy at all.

Since Austyn's birth, her sleep was never good and she used to cry for hours. Like children of her age, her mother claimed she was "never smiling, never laughing," CBS News reported. Her hands trembled as she grew, and she displayed modest developmental delays.

Her parents were aware that this was more than a period of being a cranky baby. Doctors performed brain and genetic tests...