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.
The pygmy shrew has a gestation time of a mere twelve days, whereas the white rhinoceros can sport a time of 14 months.
NO
Mammals have internal gestation with viviparous birth.
This is called the gestation period in mammals, and pregnancy in humans.
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).
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.
yes it does. the larger the mammal the longer its gestation period :)
The gestational period for a mammal varies. Smaller mammals tend to have a shorter gestational period than larger mammals.
Placental Mammals.
Gestation.
Gestation.
Small ones.