The document discusses double yolked eggs in chickens. It presents facts and myths about what causes double yolked eggs. Specifically, it explores the idea that hens mated twice per day do not produce more double yolked eggs. Instead, excessive follicle development in the ovaries of broiler hens due to factors like feed intake and photostimulation can result in the laying of double yolked eggs. The document also poses questions about why double yolked eggs matter and whether incubating double yolked eggs would result in twice as many chicks hatching.

1. Do double-yolked eggs
arise when hens are
mated twice per day?

2. Double Yolked Eggs
Fact: Old Wives Tales:
Eggs ≠ Babies Hens need a rooster
Eggs ≠ Ovaries to lay eggs
Frank is closet beef Double yolked eggs
lover come from roosters
Frank loves to eat
eggs
Supplied by Gaylene F.E.R.
Supplied by M. Fasenko

3. Chicken
Isthmus
Reproductive Tract
Shell Gland
Cloaca
Magnum
Egg Art by Alyson
Animation by Jaime
Infundibulum Supplied by F.E.R.

4. Why are broiler hens prone to
laying double yolked eggs?
Feed intake
Photostimulation

5. “Ideal” Chicken Ovary
Supplied by F.E.R.

6. Excessive Follicle Development
Supplied by F.E.R.

7. Ideal Follicle Development
(Ordered Hierarchy)
Supplied by F.E.R.

8. Excessive Follicle Development
(Double Hierarchy)
Supplied by F.E.R.

9. 4 U 2 Consider:
Cha Cha Cha!!!
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?
= ??

11. Do double-yolked eggs
arise when hens are
mated twice per day?

12. Double Yolked Eggs
Fact: Old Wives Tales:
Eggs ≠ Babies Hens need a rooster
Eggs ≠ Ovaries to lay eggs
Frank is closet beef Double yolked eggs
lover come from roosters
Frank loves to eat
eggs
Supplied by Gaylene F.E.R.
Supplied by M. Fasenko

13. Chicken
Isthmus
Reproductive Tract
Shell Gland
Cloaca
Magnum
Egg Art by Alyson
Animation by Jaime
Infundibulum Supplied by F.E.R.

14. Why are broiler hens prone to
laying double yolked eggs?
Feed intake
Photostimulation

15. “Ideal” Chicken Ovary
Supplied by F.E.R.

16. Excessive Follicle Development
Supplied by F.E.R.

17. Ideal Follicle Development
(Ordered Hierarchy)
Supplied by F.E.R.

18. Excessive Follicle Development
(Double Hierarchy)
Supplied by F.E.R.

19. 4 U 2 Consider:
Cha Cha Cha!!!
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?
= ??