Another factor is due to the shortage of food stocks during winter as the insects are being driven away and as the result, bat hibernate in pregnant condition. In response to the conditions of the environment, some mammals, such as bat delay the implantation due to the cold temperature in winter. In some cases, some mammal species may have similar gestation periods despite having significantly different body masses. The neonatal of larger mammals develop relatively more quickly and thus making it more likely that a large mammal would produce a more well-developed neonate as a consequence of its longer gestation period. Precocial mammal species generally have greater adult body weights than altricial mammals as precocial mammals have markedly longer gestation periods than altricial mammals. A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. Altricial mammals needs less time to gestate compare to the precocial (well-developed neonate) mammal. More developed infants will typically require a longer gestation period. Large mammals require a longer period of time to attain any proportion of adult mass compared to small mammals. Thus, the large mammal tend have longer gestation periods than small mammal as they tend to produce larger neonate. Large mammals develop at an absolute slower rate compared to small mammals. Larger mammals are more likely to produce a well-developed neonate than small mammals. There is a positive relationship between mass at birth and length of gestation in eutherian mammals. There are several factors affecting the length of the gestation period in mammals. Zebra ( Burchell's) ( Equus quagga burchelli)įactors affecting the gestation period in mammals Woolly monkey ( Brown) ( Lagothrix lagothrica) Stripe-faced dunnart ( Sminthopsis macroura) Slow loris ( Sunda loris) ( Nycticebus coucang) Sea lion ( California) ( Zalophus californianus) Seal ( Northern fur) ( Callorhinus ursinus) Rhinoceros ( white) ( Ceratotherium simum) Rhinoceros ( Indian) ( Rhinoceros unicornis) Rat ( Hispid cotton) ( Sigmodon hispidus) Rabbit ( European) ( Oryctolagus cuniculus) Porcupine ( North American) ( Erethizon dorsatum) Opossum (Virginia) ( Didelphis virginiana) Mouse ( White-footed) ( Peromyscus leucopus) Monkey ( Vervet) ( Cercopithecus pygerythrus) Monkey ( Talapoin) ( Cercopithecus talapoin) Monkey ( Red-tailed) ( Cercopithecus ascanius)

Monkey ( Dusky leaf) ( Trachypithecus obscurus or Presbytis obscurus) Marmoset ( Goeldi's) ( Callimico goeldii) Howler monkey ( mantled howler) ( Alquatta paliatta) Mangabey ( Grey-cheeked) ( Cercocebus albigena) Macaque ( Stump-tailed) ( Macaca arctoides)

Macaque ( Southern pig-tailed) ( Macaca nemestrina) Macaque ( Formosan rock) ( Macaca cyclopis) Macaque ( Crab-eating) ( Macaca fascicularis) Macaque ( Celebes crested) ( Macaca nigra) Langur ( northern plain) ( Semnopithecus entellus or Presbytis entellus)

Hedgehog ( European) ( Erinaceus europaeus) Hamster ( Golden) ( Mesocricetus auratus) Golden lion tamarin ( Leontopithecus rosalia) Goat ( mountain goat) ( Oreamnos americanus) Gerbil ( Mongolian) ( Meriones unguiculatus) Gerbil ( Greater Egyptian) ( Gebrillus pyramidum) Gazelle ( Thomson's) ( Gazella thomsonii) Main article: Pregnancy (mammals) § Gestation periods MammalĪntelope ( Blackbuck) ( Antilope cervicapra)Īrmadillo ( Nine-banded) ( Dasypus novemcinctus)Īrmadillo ( Six-banded) ( Euphractus sexcinctus)Ĭhinchilla ( Long-tailed) ( Chinchilla laniger)ĭeer ( Père David's) ( Elaphurus davidianus)ĭeer ( white-tailed) ( Odocoileus virginianus)ĭolphin ( Bottlenose) ( Tursiops truncatus)ĭolphin ( Spinner) ( Stenella longirostris)Įlephant ( African bush) ( Loxodonta africana)Įlephant shrew ( Bushveld) ( Elephantulus intufi)Įlephant shrew ( eastern rock elephant shrew) ( Elephantulus myurus)įlying squirrel ( Southern) ( Glaucomys volans)

Gestation period for white rhino