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A marsupial has a short gestation period, typically shorter than placental. For more information on how these estimates were ascertained, see Wikipedia's articles on gestational age. The gestation figures given here are shown in days. They represent average values and should only be considered as approximations.
Odd-toed ungulates are characterized by a long gestation period and a small litter size, usually delivering a single young. The gestation period is 330–500 days, being longest in rhinos. Newborn perissodactyls are precocial , meaning offspring are born already quite independent: for example, [ 17 ] young horses can begin to follow the mother ...
Gestation lasts approximately 340 days, with an average range 320–370 days, [50] [51] and usually results in one foal; twins are rare. [52] Horses are a precocial species, and foals are capable of standing and running within a short time following birth. [53] Foals are usually born in the spring.
For mammals, the gestation period is the time in which a fetus develops, beginning with fertilization and ending at birth. [1] The duration of this period varies between species. For most species, the amount a fetus grows before birth determines the length of the gestation period. Smaller species normally have a shorter gestation period than ...
Gestation is the period of development during the carrying of an embryo, and later fetus, inside viviparous animals (the embryo develops within the parent). [1] It is typical for mammals, but also occurs for some non-mammals. Mammals during pregnancy can have one or more gestations at the same time, for example in a multiple birth. [2]
Hippomanes first appears in pregnant horses and zebras ca. 85 days from conception, earlier there being small white flecks of tissue debris instead. [1] The changes in hippomanes color correspond to changes in color of allantoic fluid. [ 1 ]
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A newborn foal A foal will be able to run alongside of its dam within a few hours of birth.. Foals are born after a gestation period of approximately 11 months. [1] Birth takes place quickly, consistent with the status of a horse as a prey animal, and more often at night than during the day.