For an endangered animal, each and every birth is vital for the survival of the species. Zoologist and presenter Martin Hughes-Games sets out to discover just what dedication, passion and expertise is needed to create each one of these miracles. Meeting extraordinary people who dedicate their life to ensuring a future for these babies, he begins his journey in China with the pin-up of the natural world, the giant panda. Without the extraordinary advances in reproductive science, it's possible that the giant panda would be extinct. Pandas are not the only species on the brink - Martin also follows the story of the pied tamarin - a tiny and tenacious monkey teetering on the edge, and the enormous but threatened one-horned Asian rhino. Her miracle baby is likely to weigh in at an eye-watering ten stone.