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  2. Egg incubation - Wikipedia

    en.wikipedia.org/wiki/Egg_incubation

    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.

  3. Incubator (egg) - Wikipedia

    en.wikipedia.org/wiki/Incubator_(egg)

    The incubator is recorded being used to hatch bird and reptile eggs. It lets the fetus inside the egg grow without the mother needing to be present to provide the warmth. Chicken eggs are recorded to hatch after about 21 days, but other species of birds can take a longer or shorter amount of time. [10] Incubators are also used to raise birds. [11]

  4. In-ovo sexing - Wikipedia

    en.wikipedia.org/wiki/In-ovo_sexing

    A present-day ethical problem with egg production is chick culling of one-day-old male chicks, billions of male chicks that are killed as part of the production process each year. At the day the chicks hatch from their eggs the chicks are sexed. During chick sexing the day-old chicks are divided into male and female groups.

  5. Chick sexing - Wikipedia

    en.wikipedia.org/wiki/Chick_sexing

    Chicken sexing is practiced mostly by large commercial hatcheries to separate female chicks or "pullets" (destined to lay eggs for commercial sale) from the males or "cockerels" (most of which are killed within days of hatching because they are irrelevant to egg production).

  6. Chicken - Wikipedia

    en.wikipedia.org/wiki/Chicken

    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]

  7. Hatchery - Wikipedia

    en.wikipedia.org/wiki/Hatchery

    The eggs will hatch during a period that is often referred to as the hatching window, which can stretch from 24 to 48 hours depending on biological variation. [11] Once the eggs hatch and the chicks are a few days old, they are often vaccinated. Chicks hatched conventionally are provided feed and water first when they reach the rearing farm.