Surprise birth has chimp sanctuary checking vasectomies - CNN.com:

A female chimpanzee at a sanctuary has given birth, despite the fact that the facility’s entire male chimp population has had vasectomies.

Now managers at Chimp Haven are planning a paternity test for the seven males who lived in a group with Teresa, a wild-born chimpanzee in her late 40s who had the baby girl last week.

Checking chimps for vasectomies… Sounds great!