Once Lyla was born they were able to determine that her CHD was Tetralogy of Fallot. The reason she was so hard to diagnose in-vitro was due to the uniqueness of her anatomy.
Lyla's aorta actually goes up and then down to the right instead of the left. She was also born with out her PDA and her pulmonary arteries are crisscrossed and very narrow. She also has a VSD (hole in her heart).