was important that we didn't jostle the egg around so as to jar the developing bird, or damage the chalazae which is holding the developing chick in place inside the shell. When we were finished examining each egg, we returned it to the incubator with the point of the egg down (just as we did when we set the eggs on the first day) so it could continue to grow safely.
We determined that 21 out of the 24 eggs show chick development inside. We even watched movement in most all of the eggs! Examine the photo above, and you'll see the chick embryo at the bottom of the egg I'm holding. Notice the lines above that dark mass? Those are blood vessels! And right above those is the very white top of the egg - that is the air cell inside the blunt end of the egg.
For more information regarding egg candling, please visit any of the following sites:
I'm the Anatomy & Physiology instructor at New Castle Homeschool Co-op for the 2017-18 school year. As an extension to our class, my family is participating in a 4-H Embryology Program, and will be hatching up to 24 white leghorn chicks in Mid-March. If you would like to learn and enjoy the project with us, we'd love to have you along!