Contrary to popular belief, that white thing floating in raw eggs is not a baby chicken's umbilical cord. It's not chicken sperm or a beginning embryo either. (Fun fact: Most commercially produced chicken eggs are unfertilized.) It's a chalaza—pronounced cuh-LAY-zuh—and it's totally normal and safe to eat.
Sperm do not break through the eggshell. Instead they travel up the oviduct to the infundibulum to join with the egg yolk. The sperm bind to the perivitelline membrane and make a hole as they enter the egg. Hundreds of sperm may enter the yolk.
Egg white is the clear liquid (also called the albumen or the glair/glaire) contained within an egg. In chickens it is formed from the layers of secretions of the anterior section of the hen's oviduct during the passage of the egg.
The chalazae are "twisted, cordlike strands of egg white" that anchor the yolk from the top and bottom of the shell membrane, keeping the yolk from getting busted before you crack the egg. In a fresh egg, the chalazae will be especially visible—so don't feel like you need to remove them.
Did you know you can determine if an egg is fertile or not by looking at the germ spot? The germ spot is the white spot on the yolk. The non-fertile germ spot contains only the female's cells and looks like a solid white spot. In a fertile egg the germ spot contains both the female and male cells.
Now you know, fertilized eggs are completely safe to eat—unless you've neglected to care for them or wash the eggs…or you've let your broody hen have her eggs for longer than normal. You can safely eat your fertilized eggs without any worries. It's truly no different than an unfertilized egg.
A rooster inseminates a hen with his sperm by jumping on her back, lowering his tail, and touching her cloaca with his. As we mentioned earlier, this is called the “cloacal kiss”. Inside his cloaca, is a small raised point called the papilla. The papilla is what passes the sperm.
Contrary to popular belief, that white thing floating in raw eggs is not a baby chicken's umbilical cord. It's not chicken sperm or a beginning embryo either. (Fun fact: Most commercially produced chicken eggs are unfertilized.) It's a chalaza—pronounced cuh-LAY-zuh—and it's totally normal and safe to eat.
Black or green spots inside the egg may be the result of bacterial or fungal contamination of the egg. If you come across an egg with black or green spots discard the egg. Off color egg whites, such as green or iridescent colors may be from spoilage due to bacteria.
Off-color egg white, green or iridescent – Spoilage due to Pseudomonas bacteria, a very common type of bacteria that healthy people often carry without knowing it. This bacteria produces a greenish, fluorescent, water-soluble pigment in the egg white.
When an egg broken onto a flat surface has a watery, spread-out white, this usually indicates that the egg is stale. The height of the white and the weight of the egg are used to calculate a value in Haugh units on a scale of 0 to 110; the lower the value, the staler the egg.
In avian species, the specialized simple tubular invaginations referred to as sperm storage tubules (SSTs) are found in the oviduct as a sperm storage organ.
Through fertilization, the egg and sperm are saved: the egg is activated to begin its developmental program, and the haploid nuclei of the two gametes come together to form the genome of a new diploid organism.
Yolk DNA was detected with immunocytochemistry in fertilized chicken eggs. Yolk spheres were purifield with Ficoll-400 density gradient centrifugation, followed by extraction of DNA therein. Yolk DNA is sensitive to various restriction endonucleases. but shows no obvious bands, demonstrating its sequence heterogeneity.
What is this? And once a hen and rooster 'hook up' and do the deed, the sperm from the rooster is stored in the hen's oviduct and that hen will most likely lay fertile eggs for up to two weeks afterwards. So yes, if you have a rooster in your flock, a good percentage of the eggs you collect are likely fertile.
Hens will lay eggs with or without a rooster. Without a rooster, your hens' eggs are infertile, so won't develop into chicks. If you do have a rooster, eggs need to be collected daily and kept in a cool place before being used so that they won't develop into chicks.
If you have a male chicken, you will have fertile eggs. So be prepared to eat them. If you don't like the thought, don't have a male chicken. You'll still get eggs, but there's no chance of them being fertile.
Most commercial egg farms have strictly all-female flocks because male chickens aren't needed for egg production and aren't suitable for meat either (chickens raised for meat are a different breed). Without a rooster in the flock, the eggs will never be fertilised and can't develop into a chicken embryo.
Find out by candling
If the egg is fertile, then you should see a dark spot around the middle of the egg, with some spider-like veins beginning to form around it. If its not, you should just be able to see the shape of the yellow yolk inside the egg, without any signs of an embryo or veins.
Freshly laid eggs can be left out at room temperature for at least a month before your need to start thinking about moving them into the fridge. We like to make sure we eat ours in under two weeks (because they tend to taste better), but so long as the egg is eaten within one month of it being laid, you will be fine.
One rooster in a residential coop is one too many. Even your most accommodating neighbors will change their tune quickly once a rooster starts that full-throated crow at six a.m. So how can we tell a hen from a rooster? If the egg has a pointed tip, it's a rooster.
A cracked egg can still be hatched if the internal anatomy isn't damaged. You can still hatch a cracked egg if the internal anatomy of the egg isn't damaged. You'll also need to perform some immediate bandaging and dressing.
Most eggs sold commercially in the grocery store are from poultry farms and have not been fertilized. In fact, laying hens at most commercial farms have never even seen a rooster. Given the right nutrients, hens will lay eggs with or without having been in the presence of a rooster.