Why does a fertilized chicken egg weigh more?
A feshly collected fertilized egg should NOT weigh barely a nanogram more than an unfertilized egg!
Not all chicken eggs are fertilized. Any egg that a chicken lays will be unfertilized unless there is a rooster around to fertilize the egg while it is inside the chicken. Chicken eggs are fertilized when a rooster is in with the hens. The rooster will breed with the hens to continute the chicken species. This is why eggs are fertilized. If you do not want your eggs fertilized, all you need to do is…
You can do the same things with a fertilized egg as you do with a store bought egg. The one advantage of having fertilized eggs is that you can incubate the fertile one's and produce chicks. Fertilized eggs taste the same as a "store"egg and you cannot tell from the appearance that there is any difference.
You can candle a fertilized chicken egg anytime. There is very little to see for the first few days but after about day 5 you will see changes. It is best not to keep the egg out of the incubator for more than a few minutes and certainly no more than 20 minutes as they are susceptible to temperature changes and will not develop well if you let it cool.
I think the egg is fertilized before it fully becomes an egg with a shell, as we know it. The rooster mates with the chicken and when the chicken ovulates, the sperm fertilizes the egg, begining the process to form (cells divide and develop) -- as the egg with shell is released from the chicken's body to be incubated. 21 days later a chick is hatched.
An unfertilized egg is called an oocyte. That is the proper term for an unfertilized egg from any creature. Chicken eggs do not need to be categorized this way as consumers would not need to know that chicken eggs can be purchased fertilized. They would assume the eggs were unfertilized. A fertilized egg is called a Zygote.
A chicken egg becomes fertilized inside the female chicken's body while she is making the egg. Sperm from the rooster who has mated her in the past couple weeks is stored in her reproductive system and added to her eggs as they are made. Thus fertilization is an internal process. It's impossible to tell by looking at a chicken egg whether or not it is fertilized. Having a rooster with your backyard hens ensures that…
Does a chicken need a rooster to fertilize each and every egg or does the chicken only need the rooster to lay eggs?
You cannot tell if an egg is fertilized by the outward appearance. To find out if an egg is fertilized, you must actually crack open an egg and look for semen. If you need help with this, i would recommend searching backyardchickens.com/forum. Egg color has nothing to do with fertilization. Egg color is determined by genes in the chicken and is not affected by fertilization.