8 Animals With The Longest Pregnancies

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African elephants are pregnant for an average of 22 months, which is the longest gestation period of any mammal

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The frilled shark has the longest gestation period of all vertebrates, which is up to 3.5 years

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Rhinoceros pregnancy period can range from 15 to 18 months, making it one of the animals with the longest gestation periods 

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Camels are also known for having long pregnancies, lasting 12-15 months

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Giraffe's pregnancy can last between 14 and 15 months, which allows the calf to develop fully before birth

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Sea lion has the longest pregnancy period of any marine mammal, which is over 17 months 

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Dolphin pregnancies last between 10 and 18 months, depending on the species. Harbour porpoise have 10 months gestation period, while orcas have 18 months 

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Bears typically have a gestation period of 7 to 8 months, but they can delay pregnancy until conditions are right

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