Love will find a way...9 mm way, in this case

https://www.cnn.com/2023/02/09/asia/japan-zoo-gibbon-pregnancy-mystery-intl-hnk/index.html

Japanese zookeepers believe they have solved the mystery of how a gibbon became pregnant despite living alone in her cage.

Momo, a 12-year-old white-handed gibbon, shocked her keepers at the Kujukushima Zoo and Botanical Garden in Nagasaki in February 2021 when she gave birth despite having no known male companionship.

Now two years later, following a DNA test on her baby, the zoo has worked out who the father is – and even has a theory about how the gibbons mated....