by the bug. >> reporter: but what pam branum uncovered would reveal an unthinkable secret about her 21-year-old daughter -- it involves a fertility clinic and a monster unleashed from the grave. >> it shakes your world, absolutely, because everything that you knew to be true, all of a sudden wasn't. >> you know, you're like, pinching yourself, going, "this is the worst dream i have ever had. i am gonna wake up." and it didn't happen. >> reporter: it happened. >> it happened. >> reporter: it happened in salt lake city. newlyweds john and pam branum are trying to start a family with no success. so, as a last resort they go to a fertility clinic here on the campus of the university of utah. a friendly lab technician shows them a photo collage above his desk, of babies conceived by artificial insemination. >> and, you know, i just looked at those pictures and i thought, "this is gonna be it!" maybe this is gonna happen for us. >> reporter: but something about the lab tech doesn't sit...