here is lisa sylvestor. >> reporter: moments of childhood that are fleeting. >> there is nothing to indicateorter: moments oliviae never takes for granted. >> it is important to focus on what you have. >> reporter: olivia has found a place of happiness after living through the terror every family fears. >> this is veronica jane. >> reporter: her daughter died when she was only seven weeks old. >> and i have a little pajammas that she died in. i save it so i can still smell her. it's amazing that someone's life fits in this little bag on a shelf. >> i gave birth to my third child, a girl in april of 2009. and i had had 20 week ultrasound, good prenatal care. we were under the assumption that she was perfectly healthy. i put her down to bed. and that was the last time i saw her alive. >> reporter: olivia didn't know her new baby had a congenital heart defect. no shortness of breath, no blueness, nothing. >> it's your worst nightmare times 100. >> reporter: olivia later found out about a simple test that likely would have saved her daughter's life. it's called a pulse exsymmetry test. >> it is