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).
NO
No. For almost all mammals, the gestation period will be consistent regardless of the age of the male or female parent.
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.
Mammals have internal gestation with viviparous birth.
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.
Polar Bears produce babies the same way all mammals do - by breeding, followed by gestation and birth. Family units are common among mammals, but the young have to leave the family at about 1 year old, and make their way in their world.
Emus are not mammals, and are therefore not the same as other mammals at all. Emus are birds.
Every mammal is different. A dog is nine weeks, a cat, sixty to sixty-nine days, a dolphin, twelve to eighteen months. The African Bush Elephant has the longest gestation period among mammals at about 22 months. Some opossums have gestation periods of less than two weeks.
they are living
This is called the gestation period in mammals, and pregnancy in humans.
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.