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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.
Marsupials have a short gestation period—typically between 12 and 33 days, [38] but as low as 10 days in the case of the stripe-faced dunnart and as long as 38 days for the long-nosed potoroo. [39] The baby (joey) is born in a fetal state, equivalent to an 8–12 week human fetus, blind, furless, and small in comparison to placental newborns ...
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 larger animals. [2] For example, a cat's gestation normally takes 58–65 days while an elephant's takes nearly 2 years (21 ...
A marsupial has a short gestation period, typically shorter than its estrous cycle, and gives birth to an underdeveloped newborn that then undergoes further development; in many species, this takes place within a pouch-like sac, the marsupium, located in the front of the mother's abdomen.
The pademelon breeding period is throughout the year. The gestation period for the female is 30 days while the ‘joey’ stays in the pouch for sixth and a half months after birth. 4 The young are weaned from the mother around 7 or 8 months. Immediately after birth, the mother goes into oestrus and mates again.
The young are therefore born at a very early stage, although the gestation period is similar to that of many other small marsupials, at only 12 to 14 days. [33] They give birth to litters of up to 20 young. [34] Once born, the offspring must find their way into the marsupium, if present, to hold on to and nurse from a teat.
Among mammals, marsupials and most rodents are altricial. Domestic cats, dogs, and primates, such as humans, are some of the best-known altricial organisms. [14] For example, newborn domestic cats cannot see, hear, maintain their own body temperature, or gag, and require external stimulation in order to defecate and urinate. [15]
In domestic dogs, sexual maturity occurs between the ages of 6 and 12 months for both males and females, although this can be delayed until up to two years of age for some large breeds. [2] Pregnancy is possible as soon as the first estrus cycle , but breeding is not recommended prior to the second cycle. [ 3 ]