When hatching chicken eggs you can expect half of the hatch to be male eggs unless you use this method of sexing the chickens while still inside the egg. ​You can sex chickens inside the egg by looking at your eggs. Male eggs are said to be longer, a bit larger, and pointier at the small end while female eggs are said to be rounded at the small end, though not always 100% accurate, I have found this method to be about 80% accurate. Why the commercial egg industry does not use this method rather than grinding up live baby chicks, I do not know. 

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