Never-before-seen footage of the Sumatran orangutan birth is at the heart of a BBC documentary filmed to mark the 50th anniversary of the founding of Jersey's Durrell Wildlife Conservation Trust. The birth was remarkable as Dana's previous pregnancy in 2009 suffered complications that endangered her health and resulted in a stillborn infant. Following the incident Dana was left with blocked fallopian tubes, rendering her infertile.(Source: huanqiu.com)