Animal Gestation and Incubation

None, the longest is the Asian elephant after a gestation period of 19 to 22 months.

Many mammals carry baby for 9 months . Human beings are best and well known example having 9 month pregnancy period .

Humans have an average gestation period (time of pregnancy) of 280 days.

I am sorry but you can just look this one up. it's just like a normal rabbit 29-31 day put the nestbox in 4 days earlier then expected due date.

Gestation in a Giraffe Mother lasts for around 400 to 460 days. This works out to nearly 13 to 15 months of pregnancy. Baby Giraffe's are born after nearly 400+ days of preganancy. At birth, they are around 6 feet tall. That is 1.8 meters height at birth. They weigh around 100 to 150 pounds at birth

A pygmy goat is pregnant for about 150 days, then when she goes into labour it takes about an hour or so depending on the number of kids she is having.

back then in the neolithic era there lived sheep, goats, pigs, dinosaurs, mammoths, deer, tigers, elephant, rhinoceros, cheetas, ect.

Gestation occurs in a womb.

The longest tiger measured to be309 centimeters long.

like rabbit,elephant,hamster,dog,cat,carabao,cow,and sheep

The average gestation period of a sow is 112-114 days.
The duration of pregnancy in the domestic pig is between 112 and 115 days.
Approximately 114 days.
Pigs are pregnant for 3 months, 3 weeks and 3 days; keep in mind that this is the gestation period of the average farm pig.

A Black Rhino is pregnant usually between 419 and 478 days, or 15 to 16 months. The mother will give birth to a single calf, weighing in on average 35 to 50 kg, (about 80 pounds). The calf will stay with it's mother anywhere from 2 to 3 years, and sometimes, if the calf is female they may stay longer, and form a family type group of females. For more details, see the sites listed below.
they will be pregnant for 15 to 16 months (460 to 490 days)

Alligators do not gestate their young inside their bodies the way mammals do.

The lay between 30 and 50 eggs, and gestate them for 2 months.

Well, my cooter's don't have a heater and they are super healthy. Just let them bask in the sun if you need them to get warm or if you don't have a heater like i do. c:

The earliest direct evidence for true mammalian life lies in a single fossilized brain case, found in China and described by Zhe-Xi Luo and Ai-Lin Sun in the 2001 issue of Science. The find, named Hadrocodium wui, dates to around 195 million years ago, placing the origin of true mammals sometime before the early Jurassic Period and perhaps even the late Triassic Period.

between 11 and 13 months like horses and zebras. between 11 and 13 months like horses and zebras.

It depends on which type of butterfly is doing the transformation. A Monarch butterfly only takes a few days to fully transform and other butterflies can takes days or even weeks to fully transform.

the gila monster usually lays 12 eggs at a time.

Pigs have a gestation period of 114 days.

There is no breed named the Long Island chicken. The Long Island Reds is a baseball team, and their mascot is a chicken, of sorts. There is a breed called the Rhode Island Red chicken. The hens start to lay eggs when they are 5 months or older. Of course extremes in their environment may delay egg production.

About 290 days, which is about 9 months and 20 days.

Chicken eggs are only fertile if they have been fertilized. The kind that people generally buy in supermarkets or grocery stores, in order to eat them, are infertile and contain no embryo. Eggs can only be fertile if the hens that lay them are around roosters, and nearly all eggs sold in stores are produced in factory farms where the hens are restricted and never see a rooster. Any that potentially would have a rooster in the flock will be specifically labeled. Even eggs labeled "free-range" are not going to be fertile if there are no roosters in the flock.