SBGA - Egg

Step 1- Takes place in the Infundibulum, the yolk is received from the ovary and is fertilised by the sperm.

Step 2- takes place in the Magnum, the albumen is deposited and layered around the yolk.

Step 3- Takes place in the Isthmus, here both the inner and outer shell membranes are added.

Step 4- Takes place in the Uterus, Here water is added, which makes the outer white thinned, shell material is added which is made of calcium carbonate; some pigment are added to the shell

Step 5- The egg is then laid out the Cloaca

Process begins with copulation, male places sperm into the oviduct of the female by depositing sperm from the papillae to the wall of the females cloaca

Sperm can linger for up to three weeks!

Sperm fertilises the yolk in the infundibulum, egg is formed over 25 hours

Availability of light

Temperature

Food availability, diet and health

Breed

Husbandry factors

Moulting

Age

Underheating or overheating eggs can lead to abnormal embryos

Humidity is 60% for the first 18 days and 70% for the last 3 days to stop the egg drying out

Ventilation is important as oxygen enters through the shell. This is increased gradually as the egg begins to hatch

Eggs are turned about 3 times a day to stop the developing embryo sticking to the inside of the shell