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Top 10 Mammals With the Longest Gestation Periods (Pregnancy)

Name the mammals whose gestation periods are the longest.
The data is only approximate as it differs depending on the source
Sources: Wikipedia, The Mysterious World, MNN - Mother Nature Network
Gestation period = like pregnancy, the time when a female carries an embryo/fetus in her uterus
Quiz by Etanna
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Last updated: February 5, 2018
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First submittedFebruary 5, 2018
Times taken288
Average score60.0%
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Hint
Animal
Days
Months
1.
The largest land animal
African Elephant
645
21-22
Asian Elephant
617
18–22
2.
The largest toothed predator
Sperm Whale
535
14-20
3.
A large flippered marine mammal
Walrus
456
15-16
4.
A large thick-skinned ungulate
Black Rhinoceros
450
15-16
5.
The largest ruminant
Giraffe
430
13-15
6.
An even-toed pack animal
Bactrian camel
390
12-14
7.
An ungulate similar to the quagga
Grant's zebra
375
12-13
8.
A working animal also called a jenny
Donkey
365
11-14
9.
The California king of pinnipeds?
California sea lion
350
(9+3)
10.
A vicuña relative with great fleece
Alpaca
345
11.5
Etanna
+1
Level 70
Feb 5, 2018
To compare: Women's pregnancy lasts 9 months (about 39 weeks) on average and it ranges from 37 to 42 weeks (8-10 months). It needs to be mentioned, however, that human pregnancy is very specific and hardly comparable to other animals due to our use of methods invented by reason (medicine and such).
Etanna
+1
Level 70
Feb 5, 2018
Wikipedia talks about an average of 270 days of pregnancy for humans which makes for about 38.5 weeks but at the same time sets birth at 40 weeks. I'm not sure if it's because of the nuance between "on average" and "normally" or if it's just inaccurate. I had a similar problem with several of the animals, too, especially with whales :/
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