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The gestation periods for mammals differs greatly. In general it appears to be very short in small mammals, (some shrews and mice are only a few days) while increasing in length as the mammal increases in size. Elephants, hippos, bears whales and other large mammals have gestation periods lasting 9 to 18 months.
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What are the distinguishing characteristics of Eutherians?
Eutherians are a group of mammals consisting of placental mammals plus all extinct mammals that are more closely related to living placentals (such as humans) than to livingmarsupials (such as kangaroos).
Which animal has the shortest gestation period?
Marsupials in general have short gestation periods since the babies are born into the pouch at a rather underdeveloped state. I think the shortest animal gestation period if I remember correctly is that of the opposum, it's 12-13 days long.
Mammals that retain their young within the body of the mother for a long period of time are called?
Placental mammals retain their young within the body of the mother for a long period of time. Humans, dogs, bears, and mice are all examples of placental mammals.Mammals which do not retain their young for a long period of time are marsupials, all of which have short gestation periods (e.g. kangaroos, koalas, Tasmanian devils, wombats, etc) and monotremes (platypuses and echidnas), which are egg-laying mammals.
Is an echidna an invertebrate?
No. All echidnas are mammals, and all mammals are vertebrates. Echidnas are different from "echinoderms".
Do monkeys lay eggs?
No, the Spider Monkey is a mammal, and nearly all mammals give live birth. The only mammals that lay eggs are the platypus and the echidna.
Do all mammals have the same gestation period?
NO
Do all mammals have the same gestation?
Gestation and pregnancy are synonyms, although gestation is generally used for non-human animals (particularly non-pet animals) and pregnancy is generally reserved for humans (and increasingly companion or pet animals).
Does the age of the sire effect the gestation time for a horse?
No. For almost all mammals, the gestation period will be consistent regardless of the age of the male or female parent.
Are mammals internal or external development?
Mammals have internal gestation with viviparous birth.
How does gestation times and mammals compare?
Yes placental mammals have quite long gestation periods. The length is often comparable to size of the animal, larger animals like elephants and hippos have very long gestation.
What do you call the pregnancy of the animals?
This is called the gestation period in mammals, and pregnancy in humans.
What is the relationship between body size and gestation period in placental mammals?
yes it does. the larger the mammal the longer its gestation period :)
What is a mammals gestation period?
The gestational period for a mammal varies. Smaller mammals tend to have a shorter gestational period than larger mammals.
Mammals that carry their young in the uterus for a long gestation period until they are well developed and then born are?
Placental Mammals.
What is the mean of gestation?
Gestation is the length of time that a female mammal carries her baby before birth. Only mammals give birth to live young, so the word is only used to refer to mammals. The gestation period is different for every mammal. Humans have a gestation period of around nine months.
What in mammals the process of carrying young from fertilization to birth?
Gestation.
The period during which mammals develop inside the uterus is called?
Gestation.
