Do double-yolked eggs arise when hens are

mated twice per day?

Eggs ≠ BabiesEggs ≠ OvariesFrank is closet beef lover

Hens need a rooster to lay eggsDouble yolked eggs come from roosters

Fact:

Frank loves to eat eggs

Old Wives Tales:

Double Yolked Eggs

Supplied by Gaylene M. FasenkoSupplied by F.E.R.

ChickenReproductive Tract

Supplied by F.E.R.

Shell Gland

Magnum

Isthmus

InfundibulumEgg Art by AlysonAnimation by Jaime

Cloaca

Why are broiler hens prone to laying double yolked eggs?

Feed intake

Photostimulation

“Ideal” Chicken Ovary

Supplied by F.E.R.

Excessive Follicle Development

Supplied by F.E.R.

Ideal Follicle Development

(Ordered Hierarchy)

Supplied by F.E.R.

Excessive Follicle Development

(Double Hierarchy)Supplied by F.E.R.

4 U 2 Consider:

1) Why do we care about double yolked eggs?

2) If you have 1000 double yolked eggs and an incubator will you hatch 2000 chicks?

= ??

Cha Cha Cha!!!

Do double-yolked eggs arise when hens are

mated twice per day?

Eggs ≠ BabiesEggs ≠ OvariesFrank is closet beef lover

Hens need a rooster to lay eggsDouble yolked eggs come from roosters

Fact:

Frank loves to eat eggs

Old Wives Tales:

Double Yolked Eggs

Supplied by Gaylene M. FasenkoSupplied by F.E.R.

ChickenReproductive Tract

Supplied by F.E.R.

Shell Gland

Magnum

Isthmus

InfundibulumEgg Art by AlysonAnimation by Jaime

Cloaca

Why are broiler hens prone to laying double yolked eggs?

Feed intake

Photostimulation

“Ideal” Chicken Ovary

Supplied by F.E.R.

Excessive Follicle Development

Supplied by F.E.R.

Ideal Follicle Development

(Ordered Hierarchy)

Supplied by F.E.R.

Excessive Follicle Development

(Double Hierarchy)Supplied by F.E.R.

4 U 2 Consider:

1) Why do we care about double yolked eggs?

2) If you have 1000 double yolked eggs and an incubator will you hatch 2000 chicks?

= ??

Cha Cha Cha!!!