Even within the species of apes and monkeys gestation period seem to be a matter of size. For Rhesus monkeys it is 164 days and baboons 187 days. For small animals such as rabbits the period is about 33 days and for mice about 20 days.
How long are animals pregnant in months?
The gestation period for a cow is about nine months long.
|Mammal||Gestation period (days)|
|Dog (domestic)||58–65, Average 61|
What animal gets pregnant by itself?
Most animals that procreate through parthenogenesis are small invertebrates such as bees, wasps, ants, and aphids, which can alternate between sexual and asexual reproduction. Parthenogenesis has been observed in more than 80 vertebrate species, about half of which are fish or lizards.