Scientists have proposed a simple way to separate eggs by sex in the early stages of hatching. This was reported by the University of California at Davis.
In laying hen hatcheries, the chicks are separated by sex the day after hatching and the males are culled immediately. This practice can be eliminated by determining the sex of the egg at an early stage of incubation. As a result, billions of eggs with male fetuses can be used for other humane purposes, reducing waste and environmental impact. Some European countries have already banned or are planning to phase out the culling of male chicks. Either puncturing the egg or looking through the light is necessary to determine sex before birth, but this is only useful in the later stages of development.
The new method is based on capturing organic matter emitted from the bark. The researchers adapted suction cups used in industrial egg processing to “sniff” the air without opening the eggs. Air samples were analyzed in the laboratory using gas chromatography and mass spectrometry. The sex of the eggs was then determined using DNA analysis, and then a statistical relationship was established: to which substances the rooster and chicken embryos are unique.
Rapid sampling can be done with vacuum cups to test large numbers of eggs at the same time.
The authors hope their method will reduce farm costs and make production more humane.
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