Think your pregnancy has lasted forever? Those nine or so months might not seem so bad compared to the gestational periods of some of our mammalian friends:

Animal	Days	Months
Elephant	645	21 1/2 months
Rhinoceros	450	15 months
Giraffe	400	14 months, 5 days
Camel	406	13 1/2 months
Zebra	365	12 months
Donkey	365	12 months
Sea Lion	350	11 1/2 months
Horse	330	11 months

The cow and buffalo both carry their young about as long as do humans: 278 and 284 days, respectively, compared to our 280 days. Only have a month? Mice, rabbits, opossums and chipmunks all go from conception to birth in a period of 31 days or less.

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