For hundreds of years, humans have been incubating eggs to produce decent amounts of chicks, but it always consisted of a natural process in which humans took no hand in manipulating. As technology progressed, the ways humans approached hatching eggs changed as well, so we were able to mass produce chicks that were impossible beforehand.
Before humans took an active role in controlling every aspect of the egg hatching process, the success rates of having hatched eggs were extremely less. It typically involves a hen that has been exposed to a progesterone induced environment that makes her want to sit on her eggs to warm them up, so they have the proper conditions to hatch.
A hen exposed to the right heroes will make sure to ventilate and warm her eggs to hatch them and result in as many chicks as possible.
Humans first took a role in incubating eggs when they removed the need of a hen, but still incorporated the shell and the egg in the process. Hatching eggs involved a machine that specifies in providing the proper conditions for almost 10 percent egg hatching results.
These machines work by mimicking the effects of the egg candling process to provide the correct temperature, air pressure, and moisture to ensure higher egg hatching success rates.
A Japanese high school went above and beyond to remove the need for shells. Hatching chickens without shells, which was never performed or heard of until 2014. The incubation technique the group of Japanese students used was identical to the procedure described in immense detail in a paper published in the Journal of Poultry Science in the same year the Japanese students attempted to perform this experiment.
To put it in simple and easy to understand terms, the process involved cracking open an egg and dumping it into a bowl and wrapping some plastic wrap over the egg to put them in an incubator.
All this approach requires is that you buy fertilized eggs from a grocery store and make sure to incubate them inside the egg for a couple of days. You’ll then have to meticulously and quickly transfer the inner egg contents into a cup and make sure to provide perfect sterile conditions to promote high hatching rates of success.
The group of Japanese students made sure to monitor the oxygen levels, humidity, and calcium exposed in the eggs to ensure the chicks were healthy the moment they cracked their heads open from the plastic wrap.
Since the natural incubation process incorporates the egg shells, it creates a permeable environment in which both carbon dioxide and oxygen can flow through, so the chick can breathe to advance from being an embryo to a mature chick.
This means the plastic wrap needs to mimic these settings so these gases can easily flow through, which the Japanese students took care of by making small holes at the top of the plastic wrap.
Now that you know all the secrets behind incubating eggs without its shell, you can now perform this experiment and have fresh chicken eggs hatch in the comfort of your home.