In order to determine with confidence whether a hen's egg is fertilized, you need to know the signs of the formation and vital activity of the embryo. The advice of poultry farmers will tell you how to distinguish a living embryo from a dead one.
Instructions
Step 1
Chicken is the most popular bird in farms and farms. Breeding this bird allows you to solve two problems at once: providing meat and eggs. Therefore, it is important for the owner to know how to distinguish a fertilized egg from an unfertilized one.
Step 2
Devices and devices that help in checking chicken eggs.
For this purpose, there is a special apparatus produced by the domestic industry - an ovoscope. It is a small container with indentations for laying eggs and lighting located at the bottom. If there is no such device on the farm, you can replace it with a homemade one or use an ordinary piece of thin cardboard rolled into a tube 2-3 cm thick. One end of it should be attached to an egg brought to a light source, and from the second, you should examine its contents.
Step 3
How do you know if an egg is fertilized?
Whether there is an embryo in the egg can be determined with confidence no earlier than 6 days after the start of incubation. When translucent at the earliest stages (4-5 days), a darkened area without clear boundaries the size of a match head can be seen, which, when the egg is turned horizontally, moves after the yolk, slightly lagging behind it in rotation speed. Poultry farmers claim that if this area looks like the letter "O", that is, the contour of the spot is more pronounced, then the egg is fertilized. If the spot is completely darkened, then no.
Step 4
On the 6-7th day, at the thinner end of the egg, a network of thin blood vessels located next to the yolk becomes clearly visible, the air chamber is clearly visible. The embryonic disc (blastoderm) reaches 5-8 mm in size, acquires a sharper outline and still looks like a rather dark spot. If blood blotches are randomly located in the contents, this is a sign that the embryo is not present or it has died. Examine the eggs with the pointed end down, slowly turning them clockwise.
Step 5
On days 7-10, you can reliably determine whether the chick is alive. If it develops correctly, the yolk becomes paler. As a result of embryonic activity, air exchange occurs and a light yellow ring forms around the embryo. He himself looks like a dark spot of irregular shape with clearly defined borders. On day 18, a fetal heartbeat can be heard with a medical stethoscope.
