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2. Egyptian egg oven - Wikipedia

   en.wikipedia.org/wiki/Egyptian_egg_oven

   Egyptian egg oven. An Egyptian egg oven or Egyptian mamal is an oven for hatching eggs by incubation using artificial heat. [1] Manmade hatching ovens in Egypt date back to the 4th century BC. [2] Although using old processing methods, they were considered effective at hatching chickens, especially in comparison to other techniques of the time. [3]

3. Incubator (egg) - Wikipedia

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

   A modern egg incubator. An incubator is a device simulating avian incubation by keeping eggs warm at a particular temperature range and in the correct humidity with a turning mechanism to hatch them. The common names of the incubator in other terms include breeding / hatching machines or hatchers, setters, and egg breeding / equipment. [1]

4. Egg incubation - Wikipedia

   en.wikipedia.org/wiki/Egg_incubation

   Megapode eggs take from 49 to 90 days depending on the mound and ambient temperature. Even in other birds, ambient temperatures can lead to variation in incubation period. [7] Normally the egg is incubated outside the body. However, in one recorded case, the egg incubation occurred entirely within a chicken.

5. Hatchery - Wikipedia

   en.wikipedia.org/wiki/Hatchery

   Poultry generally start with naturally (most species) or artificially (turkeys and Cornish-related chicken breeds) inseminated hens that lay eggs; the eggs are cleaned and shells are checked for soundness before being put into the incubators. Incubators control temperature and humidity, and turn the eggs until just before they hatch.

6. Incubator (culture) - Wikipedia

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

   The earliest incubators were invented thousands of years ago in ancient Egypt and China, where they were used to keep chicken eggs warm. [1] Use of incubators revolutionized food production, as it allowed chicks to hatch from eggs without requiring that a hen sit on them, thus freeing the hens to lay more eggs in a shorter period of time.

7. Broodiness - Wikipedia

   en.wikipedia.org/wiki/Broodiness

   With domestication, it has become more profitable to incubate eggs artificially, while keeping hens in full egg production. To help achieve this, there has been intense artificial selection for non-broodiness in commercial egg laying chickens and parent stock of poultry. As a result of this artificial selection, broodiness has been reduced to ...