What do we mean by the gestaion period of an animal?

Question

What do we mean by the gestaion period of an animal?

Answer 1

Time between fertilization and birth

Answer 2

it means the time that the animal is with child. from the time it gets laid til the time it drops.

Answer 3

from conception to birth

Answer 4

the length of pregnacy, from fertilisation to birth..<^><....

Answer 5

Gestation is the carrying of an embryo or fetus inside a female animal. Only animals who's embryo's develop inside the mother can be referred to as having a 'gestation period'. This covers almost all mammals but applies to any animal that does the above. By the way, the difference between 'pregnancy' and 'gestation' is only by way of subjective interpretation and the word pregnancy has long been adopted as a human or more widely - mammalian  connotation.