The time between mating and birth (it averages 63 days).
(jes-ta´shәn) the duration of pregnancy; in human females this is about 266 days from the time of fertilization of the oocyte until birth. The gestation period is considered to begin on the first day of the woman's last normal menstrual period before fertilization, which is about two weeks before fertilization occ...
The length of time for carrying the young in the womb. For example, a human has a gestation period of 9 months, cats and dogs have a gestation period of 63 days.
The period of embryonic development in mammals.
Gestation period: The period of development of the young from the time of conception until birth. For humans the full gestation period is normally 9 months. The word 'gestation' comes from the Latin 'gestare' meaning 'to carry or to bear.'
The time of fetal development that occurs between conception and childbirth.
It is the period during which an embryo develops in the uterus of a mammal, from the time, of conception to birth.
Pregnancy
The period of time from mating to kindling of a doe (usually 31 days)
The period of time between breeding and kindling. Usually 28 to 31 days.
The length of gestation, the time from conception to birth. For humans this is 266 days.ExamplesMammalGestation period [days]Hamster16Mouse21Grey Squirrel44Dog62Pig113Sheep148Chimpanzee237Human266Dolphin276Horse337Whale365African Elephant640 
The time between mating and birth (it averages 63 days).
The period of development of the embryo/fetus from the time of conception until birth.
The period of carrying young in the uterus, as applied to placental mammals; the period of pregnancy.