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This 37-year old Siamang on Birth Control surprised Zookeepers by Giving Birth



A 37-year old Siamang at the San Diego Zoo named Eloise who is on birth control, delivered a baby on November 12th to the surprise of zookeepers.

Eloise, from the family of Gibbon, an endangered species, showed no signs of pregnancy, animal care manager at the zoo, Jill Andrews said.

“We’re not certain why birth control didn’t work in this case, but as with humans, it is not uncommon for contraceptive failure to happen from time to time.It was amazing… she showed no outward signs of being pregnant. Still, we are overjoyed — because any birth of an endangered species is a reason to celebrate,” Andrews told San Diego Union Tribune.

Eloise and her partner Unkie, 35, had delivered 6 children, the last born in 2006, before Eloise was place on chemical contraception.

The couple had been together for a long time, and siamangs usually stay together for life, sharing responsibility for raising their offspring, Andrews said, adding that because Siamangs are social animals and need companionship to thrive, they had to place Eloise on birth control instead of separating her and Unkie.

Siamangs are super protective of their newborns, so zookeepers do not know the sex of the baby for now.

“We’re just going to allow her to be a mama for right now,” Andrews said.

Photo Credit: @sandiegozoo


  1. LILO

    November 23, 2018 at 2:27 pm

    Gender inequality at its finest . Why is it the woman’s job to not get pregnant? I mean they pumped Poor Eloise full of BC pills but did anyone think to hand that Gibbon demon (Spawn of Yoruba demon in my mind hehe) – Unkie condoms or even peg his balls? Mscheweeeeew

    • Ganiu

      November 24, 2018 at 9:08 am


    • Ganiu

      November 24, 2018 at 9:09 am


  2. Baybie

    November 23, 2018 at 5:40 pm

    Awww! See the small baby. LOVE IT but the daddy needs ‘birth control’ too na!

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