Depends if the egg has been fertilized by the cock, and the temperature of the enviroment.
If a hen is in with NO rooster, and lays an egg, then that egg is infertile and cannot hatch.
The hen LAYS on the egg
A Monarch lays eggs, and an egg will hatch into a caterpillar.
Let them hatch and just wait if you are nervous call the vet.
The female tarantula lays eggs, which hatch out into tiny spiderlings.
If you want it to hatch make sure she sits on it if not take the egg.
An echidna is a monotreme (egg laying mammal). The female lays eggs that hatch.
=It takes about 6-8 weeks for an egg to hatch.=
egg,tadpole,tadpole with legs ans tail and frog
They take care of the egg by sitting on it. Intil it's ready to hatch.
It depends, do you want the egg for food or are you going to let the chicken try to hatch chicks?
There is no problem. The egg simply won't hatch. If there is no male parrot present, then the egg would not be fertilised anyway.