Sephardic/Mizrahi Jewish Genetic Diseases. 1  Alpha-Thalassemia. 2  Ataxia Telangiectasia. 3  Beta-Thalassemia (B- 4 T) Corticosterone Methyloxidase Type II Deficiency.  Costeff Optic Atrophy (also known as Type III 3-methylglutaconic 1  Aciduria) Cystic Fibrosis.  Familial Mediterranean 1  Fever. Familial Tumoral Calcinosis.
They will lay best at 1 to 2 years of age. All pullets (female chicken under 1 year of age) lay small eggs at first and after a while will lay larger eggs. Younger hens will lay 1 egg every 3-4 days. A hen 30 weeks old can lay 2 eggs every 3 days.
Fertilized eggs will hatch 21 days after the hen begins incubating (sitting on) the nest. Caution is advised with some broody hens; they may keep laying or collect eggs into a giant nest that they are unable to properly incubate.or backyard/pet chickens, the peak laying time is the first 3 to 4 years of age. Again, this can vary greatly between individual birds and breeds. Hens don't have a definite end to egg-laying, but eggs become fewer and at greater intervals as they age.