Elephant, 600 to 660 days. Giraffe, 420 to 450 days.
The gestation period for a cow is about nine months long.
For mammals the gestation period is the time in which a fetus develops, beginning with fertilization and ending at birth. The duration of this period varies between species. The gestation period for a cow is about nine months long.
The Patient Pachyderm
Elephants are the largest land mammals in the world, so it's perhaps not surprising that they have the longest pregnancy of any living mammal: African elephants are pregnant for an average of 22 months, whilst for Asian elephants it's 18 to 22 months.
Elephants have the longest gestation period of all mammals. These gentle giants' pregnancies last for more than a year and a half. The average gestation period of an elephant is about 640 to 660 days, or roughly 95 weeks.
Some marine mammals, such as the bottlenose dolphin, carry their young for between 10 to 12 months, which means that calves can keep up with their mother from the get-go. On the other end of the spectrum, the animal with the shortest known gestational period is the Virginia opossum.
Pregnancy length can vary significantly by species. The spiny dogfish shark can carry young for about two years, while basking sharks can do so for as long as three years. The frilled shark can wait 3.5 years before giving birth.
Did you know the longest brooding period or 'pregnancy' of any known animal is a whopping four and a half years? If you think female African elephants have it tough with their 22-month gestation period, spare a thought for the deep-sea octopus Graneledone boreopacifica.
Nine months may seems like a long time to be pregnant, but did you know that elephants have a gestation period of 624 days? That's about 21 months.
Cattle! It's usually easy to guess- the larger the animal the longer the gestation. Cattle- 9 months 10 days or 280 days Swine- 3 months, 3 weeks, 3 days or 114 days Sheep- 152 days Goats- 150 Horses- 340 days or just longer than 11 months Dogs- 63 days on avg Elephant- 547-669 days or two years!
Once they are mature, sharks will usually mate in the spring and summer. The period of gestation can be anything from 9 months to 2 years ( frilled shark gestation period may be as long as 3.5 years). Most species have an average gestation period of 9-12 months.
The shortest known gestation is that of the Virginian opossum, about 12 days, and the longest that of the Indian elephant, about 22 months. In the course of evolution the duration of gestation has become adapted to the needs of the species.
AMERICAN BLACK BEAR BABIES: 20.
While most mammals also require a break between pregnancies, either to support new young or during periods of seasonal lack of resources, the female swamp wallaby is the only one that can claim the reproductive feat of being permanently pregnant throughout its life.
Western lowland gorilla Calaya recently entered her second trimester of pregnancy. On average, gorilla gestation lasts about eight-and-a-half months. Just like other members of the great ape family—including humans—gorillas experience weight gain, and some experience bouts of morning sickness.
∙ The animals which give birth to their young ones are called viviparous animals or mammals. Animals like humans, cows, dogs, cats, lions, etc., give birth to their young ones.
The gestation period for Bibi's hippo species is typically eight months.
How many months is a lion pregnant? The gestation period is about 108 days, and the litter size varies from one to six cubs, two to four being usual.
Those with considerably longer pregnancies are camels (410 days) and giraffes (425 days).
Gestation (pregnancy)
After delivering their first litter of pigs, gilts are called sows. Gestation (pregnancy) is about 114 days, or 3 months, 3 weeks and 3 days. Piglets weigh 2 to 3 pounds at birth.
In one animal, identical siblings are the rule, not a rarity. Armadillos always give birth to identical quadruplets. In other words, female armadillos ovulate one egg that subsequently splits into four once fertilized. Scientists aren't sure why this happens, or why it's unique to armadillos, Long said.
The moment a male hippocampus whitei, also known as a White's Seahorse, gave birth to around 100 offspring has been caught on camera at Sea Life Sydney Aquarium. The babies of this endangered species, similar in size to a grain of rice, emerged from their father's pouch.
Also knows as Platypus frogs, the female amphibian, after external fertilization by the male, would swallow its eggs, brood its young in its stomach and gave birth through its mouth.
Swamp wallabies have two uteruses, so they can conceive a new baby before birthing another, scientists have discovered.