What is the average male:female ratio of a batch of eggs?

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gguineasfamily said:
Hey guys I just want to reopen this thread. There's a theory going round with chickens that a round top egg is female and pointy is male. If anyone wants to experiment with this theory please post your results!
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I've now read several articles debunking this. Since egg shape seems to be a function of the hen laying the egg, some hens would have nothing but boys and others nothing but girls.
But, really interesting, I've read several articles, that says sex can be somewhat influenced by incubation temps. "The Chicken Chick" had an article about this, but not sure what you would use to google it. Anyway, the article claims if you run the incubator a half degree cooler more pullets result while half a degree warmer gives more roosters. Maybe because the change in temperature influences which eggs hatch.
I was thinking of trying this the next time I ran the incubator. Has anyone else tried this? What were the results? If the incubator ran too hot? or too cold?
 
dekel18042 said:
Quote:
The information that I have seen on this implies that temperature does influence which eggs hatch. It is a fact that incubating at a different temperature cannot change the sex of the chick since that is determined at the time of fertilization.

There have also been posts that claim giving the flock ACV in their water will influence the sex at hatch. The claim being made that it will cause a mostly female hatch. I haven't seen enough confirmed results to have any idea whether or not this is a valid assumption but changing the pH of the genital tract can influence which sperm survive to fertilize the egg in humans.
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R2elk said:
The information that I have seen on this implies that temperature does influence which eggs hatch.  It is a fact that incubating at a different temperature cannot change the sex of the chick since that is determined at the time of fertilization.

There have also been posts that claim giving the flock ACV in their water will influence the sex at hatch.  The claim being made that it will cause a mostly female hatch.  I haven't seen enough confirmed results to have any idea whether or not this is a valid assumption but changing the pH of the genital tract can influence which sperm survive to fertilize the egg in humans.
Click to expand...


Thanks for the info! And everyone else who replied!

Interesting - in birds I heard that the female determines the gender, with Z and W chroma zones. Feel free to correct me or add more

And yes I heard they the temp of incubator doesn't change the gender of eggs - but hot or cold (I'm not sure which way round) kills some of the male of female embryos. Therefore most of one gender and only some of the other gender will hatch, but this causes a lower hatch rate and maybe more deformities. I think.
 
Yes and also any experiments results please post!

Also if anyone has any test results on guineas especially - I know they're really hard to sex but I hope we can find a way to cause more females or males

Again thanks to everyone who posted :)
 

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