When I was in high school, for a science project the teacher got an incubator from somewhere and we put 36 eggs in it.
Then every school day, the first thing he did was take an egg out of the incubator and crack it open - - - - so we could watch the progressive growth of the chicks. The first week or so wasn't so bad, but after that, the chick was so far developed it really upset me to watch him break open an egg every day at the beginning of the class. Some of the boys in the class thought it was 'neat' and would remain at the study table - - - - to see how long the chick would live after the egg was broken open.
One day about 4 days before the hatch date (if I can remember correctly, we are talking 37 years ago now) the chick was particularly well developed and tried to scramble all around the container he was in before he died. One of the girls threw up from being upset. No more eggs were cracked open after that day. The principle put a stop to it after complaints from parents.
Any way, even for a country girl, who had her own flock of chickens, I found the experiment to be a total waste of good eggs and good chicks. It was interesting to watch the actual development of the chicks, but, it was still upsetting to know that the poor chicks gave their little lives for the experiment.
Guess who took home the chicks that did manage to hatch normally ? ? ? ? Me, lucky little ol' me
PS. My first little green egger came from those chicks