The gestation period is 52 days.

The average gestation period lies between 50 and 115 days, although the ursids and mustelids have delayed implantation, thus extending the gestation period 6 – 9 months beyond the normal period.

Females give birth to one or two young after a gestation period of between 130 and 170 days, depending on species.

The gestation period lasts from 60 to 63 days.

Its gestation period is eight months.

The elephant's gestation period is 22 months, the longest of any land animal.

For most species, total gestation lasts about 11. 5 months, including a several-month period of delayed implantation of the embryo.

The gestation period lasts from 140 to 180 days.

The time interval of a gestation is called the gestation period.

Below are average and approximate values ordered by gestation period ( note for humans gestational age is counted from the LMP, for other animals the counting method varies, so these figures could be 14 days off ):

The gestation period for gray whales is approximately 13. 5 months.

The breeding season is from April to October in the Northern Hemisphere, with two to five litters of one to 13 young being born after a gestation period of 16 to 23 days.

Even until the mid-nineteenth century zoologists were unaware of the gestation period of elephants but Jahangir on the other hand had accurately estimated the gestation period of elephants to be 18 to 19 months in the early-seventeenth century itself.

Lorisids have a gestation period of four to six months and give birth to two young.

The gestation period of a llama is 11½ months ( 350 days ).

One Nepōhualtzintzin ( 91 ) represented the number of days that a season of the year lasts, two Nepōhualtzitzin ( 182 ) is the number of days of the corn's cycle, from its sowing to its harvest, three Nepōhualtzintzin ( 273 ) is the number of days of a baby's gestation, and four Nepōhualtzintzin ( 364 ) completed a cycle and approximate a year ( 1 days short ).

Giraffe gestation lasts 400 – 460 days, after which a single calf is normally born, although twins occur on rare occasions.

Manatees typically breed once every two years, gestation lasts about 12 months, and it takes a further 12 to 18 months to wean the calf.

The gestation period lasts from 59 – 72 days, with an average of 63 – 68 days.

The kits are born after a gestation that lasts between 64 and 67 days, with an average length of 66 days.

In captivity, gestation of black-footed ferrets lasts 42 – 45 days.

The gestation period lasts 61 – 70 days, with pups being born in April – May.

Their gestation period lasts about 56 days.

Instead, implantation occurs eight months later ; although gestation lasts 245 to 298 days, embryonic development requires only 25 – 30 days.

The gestation period lasts for 12 months and the young are born at a length of 2. 4 to 2. 7 metres ( 8 to 9 ft ) with a weight of around 185 kilograms ( 400 lb ).

Porpoise gestation lasts 10 to 11 months, and the lactation period lasts at least two months.

Once a female is pregnant gestation lasts 130 days and she may give birth to as few as one offspring or as many as thirteen.

The gestation period is 11 months and lactation lasts for about a year and a half-both typical figures for dolphins.

Most births in Gabon occur in the wet season, from January to March, and gestation usually lasts 175 days.

The gestation period of grey langur lasts around 200 days, at least at Jodhpur, India.

When females reproduce, they have a single birth of one individual, and the gestation period lasts five months.

The gestation period lasts 10 months, with actual embryonic development taking place only during the last four weeks of this period, an adaptation to timing births for spring, when small mammalsare abundant.

The gestation lasts 140 – 170 days and mothers typically give birth to twins.

It has two litters per year, each having usually one young, sometimes two ; gestation lasts 115 – 120 days.

The gestation period lasts 90 – 91 days.

Other examples include placental gestation ( for eutherian mammals ), or bipedal locomotion ( in hominins ).

The decidua becomes part of the placenta ; it provides support and protection for the gestation.

Mostly at the end of the dry season, their four to five-month gestation ends with the birth of a single offspring, which lives in the family for a while after its weaning ( at the age of five to six months ).

** Estrogen together with progesterone promotes and maintains the uterus lining in preparation for implantation of fertilized egg and maintenance of uterus function during gestation period.

The title was chosen late in the poem's gestation ; it refers to the youngest of the three Parcae ( the minor Roman deities also called The Fates ), though for some readers the connection with that mythological figure is tenuous and problematic.

The American College of Obstetricians and Gynecologists, American Academy of Pediatrics and the Centers for Disease Control recommend that all pregnant women between 35 and 37 weeks gestation should be tested for GBS.

" Leone abandoned this project in favor of A Place Only Mary Knows, though Donati wrote a treatment and the project remained in gestation for years after Leone's death.

The gestation period is 15 to 17 days, after which the baby sugar glider ( 0. 2 g ) will crawl into a mother's pouch for further development.

A jennet is normally pregnant for about 12 months, though the gestation period varies from 11 to 14 months, and usually gives birth to a single foal.

Because of this and the longer gestation period, donkey breeders do not expect to obtain a foal every year, as horse breeders often do, but may plan for three foals in four years.

From 1995 – 1998 the U. S. SIDS rate for births at 37 – 39 weeks of gestation was 0. 73 / 1000 ; the SIDS rate for births at 28 – 31 weeks of gestation was 2. 39 / 1000 )

Non-medically indicated ( elective ) childbirth before 39 weeks gestation " carry significant risks for the baby with no known benefit to the mother.

The American College of Obstetricians and Gynecologists ( ACOG ) guidelines recommend a full evaluation of the maternal-fetal status, the status of the cervix, and at least a 39 completed weeks ( full term ) of gestation for reduced mortality and optimal health of the newborn when considering induction of labor.

Normally, ovine placental mass increases until about day 70 of gestation, but high demand on the placenta for fetal growth occurs later.

The gestation period is 45 – 50 days, during which the male will procure food for the female.

In implanting a goat embryo for gestation in a sheep, the sheep's immune system would reject the developing goat embryo, whereas a " geep " embryo, sharing markers of immunity with both sheep and goats, was able to survive implantation in either of its parent species.

There is evidence for human behavioral learning prenatally, in which habituation has been observed as early as 32 weeks into gestation, indicating that the central nervous system is sufficiently developed and primed for learning and memory to occur very early on in development.