MY head
If there is no male with her and she lays an egg, it will not be fertile and there is no chance of it hatching.
Do you have a Rooster living with Hens? If so, chances are, yes, the eggs will be fertile. If the hen is brooding, meaning she is sitting on top of the egg to keep it warm, then it's probably fertile, if not, then it's not fertile. In any case should you have a rooster and a hen together, and the hen lays an egg, and it doesn't brood, then you should keep the egg warm. I think to check just hold the egg up to a light lol.
The female lays the eggs
No. A chicken is a bird. No marsupial lays eggs.
The mother lays 1,000 eggs every time she lays them. The mother lays 1,000 eggs every time she lays them.
I don't think so, but check out the link for yourself.
The Ostrich lays big eggs.
they lay eggs
every single spider lays eggs everything that alive lays eggs besides males
There are no male animals that lay eggs. Many people think that a male sea horse lays eggs, but a female sea horse lays eggs and the male carries them and takes care of it.
This question doesn't really make sense, but I think from my understanding of the question the answer is a hen.
Parakeets lay fertile eggs when they are with the opposite gender (i.e male with female) and they have a warm, comfortable place to lay it such as a nest box.