Chicken and eggs or Eggs and chickens

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Information about eggs and chickens

Information about eggs and chickens

INTERESTING FACTS ABOUT EGG DEVELOPMENT:

  1. The egg-production process begins when light stimulates a photosensitive gland near the hen’s eyes: when the gland is stimulated an ova is released.
  2. Hens have one functional ovary.
  3. Hens generally lay an egg a day for six days and then rest for one day.
  4. Hens start laying eggs when they are 4 to 5 months old.
  5. The smallest ever egg laid by a hen weighed just 7.3g and was the size of coin.
  6. As hens grow older, they lay fewer eggs but the eggs become larger in size.
  7. The average hen lays on average 300 eggs a year.
  8. When female chicks hatch, they have 4000 tiny ova. As the hen matures, some of these will become yolks and then eggs.
  9. It takes around 25 hours for the egg to form.
  10. The process by which eggs are formed is like a conveyor belt in a factory: at any one time, there are a number of yolks at different stages of development
  11. Eggs can have multiple yolks. The record for the number of yolks found in one egg is nine.
  12. An egg without a yolk is called a “wind”, “dwarf” or “fart” egg.
  13. The largest ever hen egg was laid in 1896. It had five yolks and weighed 340g.
  14. It is possible for a hen to lay an egg with a fully formed egg inside it.

THE EGG-PRODUCTION PROCESS:

  1. The ova goes from the ovary and to the funnel-like structure called the INFUNDIBULUM where it is fertilised by the rooster. This part of the process takes about 15 minutes.
  2. The yolk then moves down into the MAGNUM where the inner and outer shell, membranes, vitamins and mineral salts are added. This process takes 3 hours.
  3. The yolk then continues on to the ISTHMUS where the egg yolk is wrapped in egg white (albumen). This process takes an hour.
  4. The yolk and white then move on to the UTERUS or SHELL GLAND where they are covered with a shell. Water is first added to thin the outside of the albumen layer, then shell material (mostly calcium carbonate) and finally pigments are applied. This process takes about 21 hours.
  5. The egg then passes through to the vagina and is laid. This process takes 1 minute.
  6. The shell formation process begins in the afternoon/early evening so it is important not to disturb them at this time.
  7. Any thin points or cracks in the eggshell can be repaired before the egg is laid.