Orangutan stuns zookeepers by becoming pregnant while on the pill

Adelaide zoo is hoping to support 34-year-old orangutan Karta through her pregnancy as she has lost six infants in the past

A Sumatran orangutan at Adelaide zoo has fallen pregnant, despite being on contraceptives.

Karta the 34-year-old orangutan is due early in 2017. Jodie Ellen, a senior primate keeper, announced the "exciting but nerve-wracking" news on the zoo's Facebook page. "It wasn't a planned pregnancy," she said. "Mother Nature actually intervened."