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Panda, 135 days
One of the reasons pandas are an endangered species is that they cannot reproduce as quickly as other animals. They usually only give birth to one cub at a time, every 2 years.
Lemur, 135 days
There are over 100 different types of lemurs. Ring-tailed lemurs usually mate in April and give birth to 1-2 cubs in summer. Their pregnancy lasts a bit more than 4 months.

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