After 3-10 days of the bird sitting on the egg, take the egg to a strong light and if it has redish vines in it, then it is fertile. If it's just white then its not.
an egg candler is when a bright light is shone on the eggs to check the fertility rate of the egg (infertile or fertile)
If they are round and plump. Infertile eggs also tend to be yellow. Even if the eggs are dented I would still put them in an incubator until they mold since they can still be fertile and produce perfectly healthy babies.
the grow a white/green mosk around the egg
An egg that has not been fertilized by the rooster's sperm is called an infertile egg. a hen will lay infertile eggs without the assistance of a rooster. Commercial egg layers have never and will never know what a rooster looks like, but they will produce an infertile egg 6 days out of a 7 day week.
The eggs have to be fertilized before being laid in order to "grow" a chick. No most hens eggs for the human food chain are infertile all eggs are screened for fertility (blood spot in egg if fertile) any fertile eggs are removed before packaging. Most battery eggs are infertile, there is more chance of a fertile egg from free range chickens.
I think that being very fertile means your eggs are of a good quality, very healthy etc. Ovulation is where your ovary(one of the two) releases an ovum down the fallopian tube. Obviously, whenthis egg hasn't been fertilised within so many days, you have you period. This whole process is known as the menstrual cycle.
Yes, If you had a fertilized egg it would be developing into a chick. Unfertilized eggs are the ones you buy in the stores.
When the chicken haches.You can't tell if the chick is growing by just whatching.To see if the egg is growing,hold it up to a bright light.If the egg is fertile,it will have a dark spot in the center indicating that tha chick is growing.If the egg is infertile,it will be somewhat clear(eat it).This practice is called candling.
Goldfish of any type are all egg laying fish which means that they do not get pregnant
Orandas, or any other type of goldfish are egg laying fish, so they do not get pregnant
You could take to a lab or a vet they have these special machines that can tell if its fertile or not