Depends on what species, they all differ greatly.
a gestation period for a donkey is 12 months
If it does not appear to be cracked, there is nothing wrong with putting it back. The mother will not mind the little bit of scent you may leave on the egg. The mother may have pushed it out intentionally because it may be infertile or another egg has hatched.
A jennet's (female donkey) gestation period is 360-375 days or more in some cases, that is compared to a mare's (female horse) gestation period which is 335-345 days or more in some cases.
The gestation period of the lioness is normally 105-110 days.
A mule's gestational period is intermediate between those of its parent animals--generally eleven months for a horse, 11 to 14 months for a donkey. Between eleven and twelve months gestation is standard.
The gestation period of a goose is called the incubation period. After the incubation period, if the egg is fertilized, a chick will hatch.
cod doesnt have a gestation period, because it is an egg layer. Cod, being a type of fish is an external reproductive organism, therefore there isnt a gestation period for any kind of fish
gestation
The spiny anteater, more correctly known as the echidna, is an egg-laying mammals. The egg within the mother's body has a gestation period of 23 days. Once laid, the egg is then incubated for another ten days.
Gestation
The gestation period of a Budgee bird is around 9 days. It will take 17 to 23 days for the egg to hatch, after it has been laid.
Mockingbirg egg gestation is 12 - 13 days. Young fledge 11 - 13 days after that.
Alligators have a gestation period of 60-65 days.
In humans 9 months. Other animals have different gestation periods. Gestation is the period of time that the fetus spends growing inside its mother's uterus. The gestation period for humans is approximately 40 weeks long.
No, animals that lay eggs do not have a gestation period. Instead, the embryo develops inside the egg until it is ready to hatch. Gestation typically refers to the time a mammal carries a developing fetus inside its body before giving birth.
River otters have a gestation period of about 290-380 days due to delayed implantation of the fertilized egg. This is according to the Ohio Dept. of Natural Resources Division of Wildlife Publication 384 (R803)
Chimps have an 8 month (240 day) gestation period.