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Egg incubation is the process by which an egg, of oviparous (egg-laying) animals, develops an embryo within the egg, after the egg's formation and ovipositional release. Egg incubation is done under favorable environmental conditions, possibly by brooding and hatching the egg.
Pack weight (12 eggs) Mass range per egg Average mass per egg Edible portion per egg King-size 860 g 71.7 g – 78.5 g 73 g 64 g Jumbo 800 g 66.7 g – 71.6 g 68 g 59 g Extra-Large 700 g 58.3 g – 66.6 g 60 g 52 g Large 600 g 50.0 g – 58.2 g 52 g 45 g Medium 500 g 41.7 g – 49.9 g 43 g 37 g
Fertile chicken eggs hatch at the end of the incubation period, about 21 days; the chick uses its egg tooth to break out of the shell. [34] Hens remain on the nest for about two days after the first chick hatches; during this time the newly hatched chicks feed by absorbing the internal yolk sac. [42]
The morphology of the limbs, starting with the appearance of wing bud at stage 16, is a useful landmark for staging chick embryos until hatching. Between stages 15 and 35, the appearance of specific structures within the limbs (such as joints and digits); at later stages the length of the toes are used.
Voting period is over. Please don't add any new votes. Voting period ends on 10 Jun 2017 at 01:47:55 (UTC). Original – Diagram of a chicken egg in its ninth day of incubation showing all four extraembryonic membranes along with the embryo, the air pocket, and the shell
Egg production in the U.S. dropped 4% in November as the price of eggs and cases of bird flu continue to rise across the country, according to a report from the U.S. Department of Agriculture ...
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