Can I determine whether an egg has a living embryo in it earlier than the hatch date?
Sometimes it is necessary to test the incubated eggs for fertility. If large numbers of infertile eggs are incubated, they can be found and discarded, and the extra space used for additional eggs. This test does not injure the young embryos and is reliable for eliminating eggs that will not hatch. candling eggs Make a tester or candler by placing a light bulb and fixture inside a cardboard box. Cut a small, round hole in the top or side of the box, and let a narrow beam of light escape from the box. The hole should be ½ to ¾-inch in diameter. You can see the internal features of the egg by placing it against the hole. A darkened room makes testing easier. The eggs are normally tested after four to seven days of incubation. Eggs with white shells are easier to test and can be tested earlier than dark shelled eggs. Two classes of eggs are removed on the basis of this early test, “infertiles” and “dead germs.” “Infertile” refers to an unfertilized egg or an egg that started developing but
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- Can I determine whether an egg has a living embryo in it earlier than the hatch date?
