HomeFactopediaBrainoffsRankingsCommunityLog In
You know 0 facts


Gestation Periods in Mammals

Your overall rating on Gestation Periods in Mammals =
0%
Your best rally score on Gestation Periods in Mammals = 0 facts

Play Fact Master on Gestation Periods in Mammals    

Challenge Friends to a Brainoff on Gestation Periods in Mammals    

Play a Rally Game on Gestation Periods in Mammals    



51 facts:

An American Buffalo
   has an average gestation period of   
270 Days
Also known as American Bison
An American Opossum
   has an average gestation period of   
12-13 Days
One of the shortest gestation periods of all mammals,
An Asian Elephant
   has an average gestation period of   
645 Days
Almost 2 years!!
An Ass
   has an average gestation period of   
365 Days
Ass foals are fully weaned at one year and no longer need their mothers
A Baboon
   has an average gestation period of   
187 Days
Females typically give birth every other year
A Bactrian Camel
   has an average gestation period of   
410 Days
Calves are nursed for 5 years until they reach sexual maturity
A Barbary Ape
   has an average gestation period of   
210 Days
The young typically weigh 450g at birth
A Beaver
   has an average gestation period of   
122 Days
Kits are born fully furred, with their eyes open and learn to swim soon after birth.
A Black Bear
   has an average gestation period of   
210 Days
The eggs of the female are not released from the ovaries until mating has occurred, this is called ‘induced ovulation’
A Black Rhinoceros
   has an average gestation period of   
450 Days
A calf weighs about 35 – 50 kg at birth,
A California Sea Lion
   has an average gestation period of   
350 Days
Sea Lionsemply ‘delayed implantation’ which assures that the pup is born during the best time of the year for survival
A Cat
   has an average gestation period of   
58-65 Days
Giving birth in Cats is called ‘Queening’
A Chimpanzee
   has an average gestation period of   
230-240 Days
A Chinchilla
   has an average gestation period of   
110-120 Days
A Chipmunk
   has an average gestation period of   
31 Days
A Cow
   has an average gestation period of   
279-292 Days
Closer to 9 months than a human’s is!
A Dog
   has an average gestation period of   
58-70 Days
The smaller the breed the shorter the gestation.
A Domestic Goat
   has an average gestation period of   
145-155 Days
A Domestic Pig
   has an average gestation period of   
112-115 Days
There has been much concern from animal welfare groups over the use of gestation crates in which a farmed pig will spend most of her life.
A Domestic Rabbit
   has an average gestation period of   
30-35 Days
When a doe gives birth it is called ‘Kindling’
A Domestic Sheep
   has an average gestation period of   
144-151 Days
Ewes naturally come into heat in autumn or winter, meaning lambs are born in spring or summer when it is warm and grassy. Domestic sheep are given hormones to produce lambs throughout the year for meat.
An Elk
   has an average gestation period of   
240-250 Days
A Giraffe
   has an average gestation period of   
420-450 Days
The giraffe is the only ruminant with gestation longer than a year (http://www.wildlife-pictures-online.com/giraffe-information.html)
A Gorilla
   has an average gestation period of   
257 Days
There is a 40% mortality rate for newborns in the wild which means that an adult female usually only has one surviving offspring produced every six to eight years.( http://www.seaworld.org/animal-info/info-books/gorilla/birth-&-care.htm)
A Grant’s Zebra
   has an average gestation period of   
365 Days
A newborn foal has brown and white stripes.
A Grey Squirrel
   has an average gestation period of   
30-40 Days
Female squirrels can mate only twice a year, but males can mate at any time.
A Grizzly Bear
   has an average gestation period of   
225 Days
The eggs of the female are not released from the ovaries until mating has occurred, this is called ‘induced ovulation’
A Guinea Pig
   has an average gestation period of   
68 Days
Female guinea pigs are called sows; males are called boars
A Hippopotamus
   has an average gestation period of   
225-250 Days
A Horse
   has an average gestation period of   
330-342 Days
A Human
   has an average gestation period of   
266 Days
Humans are the only mammals whose brain keeps growing well after birth. This is called ‘secondary altriciality’
A Kangaroo
   has an average gestation period of   
42 Days
The joey then remains in its mother’s pouch for about 235 days, continuing to develop.
A Leopard
   has an average gestation period of   
92-95 Days
A Lion
   has an average gestation period of   
108 Days
Because this is such a short gestation period for a large animal, the cubs are born blind, weighing only about a pound.
A Llama
   has an average gestation period of   
330 Days
Baby llamas are called crias
A Meadow Mouse
   has an average gestation period of   
21 Days
A Mink
   has an average gestation period of   
40-75 Days
Female mink have ‘delayed implantation’ which assures that the kits are born during the best time of the year for survival.
A Moose
   has an average gestation period of   
240-250 Days
The birth of twins is common.
A Muskrat
   has an average gestation period of   
28-30 Days
At a month old the young are independent ebough to be ejected from the nest by the mother.
An Otter
   has an average gestation period of   
270-300 Days
Otters emply ‘delayed implantation’ which assures that the cub is born during the best time of the year for survival
A Polar Bear
   has an average gestation period of   
240 Days
Includes a periuod of delayed implantation which assures that the cub is born during the best time of the year for survival (http://www.seaworld.org/animal-info/info-books/polar-bear/birth-&-care.htm)
A Porcupine
   has an average gestation period of   
112 Days
Has the longest gestation period of any rodent.
A Puma
   has an average gestation period of   
90 Days
A Raccoon
   has an average gestation period of   
63 Days
A Red Fox
   has an average gestation period of   
52 Days
Litters vary in size from 1 to 13 pups
A Rhesus Monkey
   has an average gestation period of   
164 Days
A Seal
   has an average gestation period of   
330 Days
Pups are born on land but may be able to swim just a few hours after.
A Sperm Whale
   has an average gestation period of   
480-500 Days
The newborn calf is about 13 feet (4 m) long and weighs about 1 ton (0.9 tonnes)
A Tiger
   has an average gestation period of   
105-113 Days
The first two years of life is a dangerous time for tigers. The mortality rate is at least 50% (http://www.seaworld.org/infobooks/Tiger/birthtiger.html)
A White-tailed Deer
   has an average gestation period of   
201 Days
Does are seasonally polyoestrous which means they come into heat for a short twenty-four hour period (usually in November).
A Wolf
   has an average gestation period of   
60-68 Days
The female wolf will continue to hunt with the pack right up until giving birth


Facts contributed by:


drakaina








   About - Terms - Privacy Log In