Three-month-old Elayna Nigrelli has redefined what it means to be a miracle baby. She was born while her mother was technically dead. In February, Erica Nigrelli was teaching at a high school in Missouri City, Texas, when she walked into a co-worker's classroom. Nigrelli said she felt faint, placed her hands on a table to steady herself and then passed out. Three teachers immediately grabbed a defibrillator and also began performing CPR. Kids in the classroom ran out, yelling for help. Nigrelli's husband, Nathan, also a teacher, was just two doors down. He rushed into the room. "Erica was lying...