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Actually, the temperature of the incubator does not change the sex of the eggs. The sex of the chick in the egg is already determined in each egg and cannot be changed. I have heard many people though, who have have a well tested theory about eggs and temp. If you have the temperature set higher, more pullets will hatch, not because it changes the sex of the eggs, but actually kills off most of the male eggs during incubation and only the females hatch. So technically...you will hatch more pullets that cockerals with a higher temp, but the hatch rate will be lower because the higher heat kills off the cockerals. But there is no getting pure pullets in a hatch, a few males are bound to hatch, even with higher temps.It is the same the other way around, if the eggs are refrigerated before incubation, or incubated at a lower temp than usual, more cockerals will hatch and more of the pullet eggs die. Now these aren't "facts" but many people including myself have tested this out, and it seems to prove right most times.
Im not sure about the breeding thing with the older males and younger females, I have never heard that, that might be something I have to try out....... In humans, the male determines the sex of offspring, im not sure about chickens. I guess we will find out when your eggs hatch.
Also, having to do with the high temp killing male thing, I heard you will get more pullets in the summer because the rooster is hot and many of the sperm with the male gene die off before he mates with the hens. Really though nothing is for sure and all we can do is hope.
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Actually, the temperature of the incubator does not change the sex of the eggs. The sex of the chick in the egg is already determined in each egg and cannot be changed. I have heard many people though, who have have a well tested theory about eggs and temp. If you have the temperature set higher, more pullets will hatch, not because it changes the sex of the eggs, but actually kills off most of the male eggs during incubation and only the females hatch. So technically...you will hatch more pullets that cockerals with a higher temp, but the hatch rate will be lower because the higher heat kills off the cockerals. But there is no getting pure pullets in a hatch, a few males are bound to hatch, even with higher temps.It is the same the other way around, if the eggs are refrigerated before incubation, or incubated at a lower temp than usual, more cockerals will hatch and more of the pullet eggs die. Now these aren't "facts" but many people including myself have tested this out, and it seems to prove right most times.
Im not sure about the breeding thing with the older males and younger females, I have never heard that, that might be something I have to try out....... In humans, the male determines the sex of offspring, im not sure about chickens. I guess we will find out when your eggs hatch.
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