Ultra-marathon runner Lisa Tamati has forged a career running massive distances, across the most hostile of environments, including the Sahara Desert, the Australian Outback and the Himalayas.
Now, she has a new challenge. At age 47 she and her fiancé Haisley O'Leary are trying to have a baby.
She knows as well as anybody that at her age it's a long shot.
But in our interview with her she displays incredible honesty and emotion about the journey she and Haisley are on, in this, the race of her life.