Olivia: Are you telling me I only have a couple of hundred years left?
Pryce: More like a normal human lifespan.
Olivia: Human lifespan is over like that. Hardly worth going to the trouble of being born.
When Olivia and Dr Galina are in the bathroom, Galina mentions an umbilical chord, from a baby whose mother died (Nadia), that contained Olivia's mitochondrial DNA. Mitochondrial DNA comes from the mother, so Nadia's Mitochondrial DNA came from Letha who got hers from Marie, absolutely nothing to do with Olivia.