I put the following in as a reply on to someone else's post, but it fits here, so I'll copy it here. I wonder if anyone else ever thought what I've thought all my life until the last couple of months.
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Ya wanna talk about ignorance? I'm seventy years old, and until two weeks ago while reading a book about chickens, all my life I thought that the white spots near the yolk was rooster sperm/semen; used to cut it out of the egg before frying/scrambling, too gross. I had never heard nor known anyone else who knew that those two white spots were the original cords on the two ends of the egg that held the yolk in the center of the egg until the egg/shell was cracked open. I've known lots of people who did the same thing I did. I was really surprised to learn that in order to tell if the egg was fertile when it's in the skillet is look for a tiny little dot on both sides of the yolk. Like I said, "Ya wanna talk about ignorance?"
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I read about "...both sides of the yolk" on another post. Was that correct or does the spot only show on one side of the yolk as in the pictures being shown on this post?