Air sac determines sex.

[Boop2006]

I recently read a booklet by Thomas Quisenberry that was titled How to Tell The Sex of an Egg Before Incubation. In the book it described candling a chicken egg prior to incubation. If the air sac is off center and can only be viewed from the front and sides of the egg, a female will hatch. If the air sac is centered in the end and can be viewed from all sides, a male will hatch. This was proved in a University study. Mrs. Noda Fry was the person who reported this method to Mr. Quisenberry. She hatched 96 eggs and 92 were female. She also described holding a chick by the head. If the legs relax and hang, this is a cockerel. If the legs draw up toward the head/abdomen, this is a female.
Has anyone else ever tried this? I am about to put a couple dozen eggs in the incubator that I have candled using this method.

 

[sourland]

If it sounds too good to be true, it probably is.

 

[nuthatched]

If the legs relax and hang, this is a cockerel. If the legs draw up toward the head/abdomen, this is a female.

This, is 100% full strength, undiluted, grade-A hogwash.

 

[FrostRanger]

If such a thing were true commercial hatcheries would be using it so they wouldn't hatch out male chicks

 

[Mill Chick]

Keep use updated when they hatch and if it works!

 

[Kiki]

This, is 100% full strength, undiluted, grade-A hogwash.

Agreed.

 

[Boop2006]

Keep use updated when they hatch and if it works!

Thank you for an encouraging response. I will.

 

[Boop2006]

Agreed.

Agreed.

So y'all tried it and it did not work??

 

[OrpingtonManiac]

I wish it was true, but as frostranger said, commercial hatcheries would probably be using the method already.

This was proved in a University study.

Does the booklet say what study? It would be quite an interesting read IMO.

But if you do try it i'd love to be updated and see whether it works!

 

[townchicks]

Logically, this makes no sense. I have found that the air sack can vary based on individual hens, the shape of the egg, and how the egg is stored. I have no rooster, so zero chance of fertility. It is my understanding that the male determines the sex of the offspring, so if this theory were true, why would air sacks in infertile eggs vary that much? I do hope, however, since you are incubating anyway that you keep a record, and keep us posted. If it is true, what a Boone to those of us that can't keep roosters.