In my childhood we had quite a few fertilized eggs. We had a farm and had our own chooks. It was my job to find the nests and collect the eggs you see. I was very young and afraid that a snake would get me. And those bloody hens would nest all around. So sometimes the eggs were not new ones….🥹 I was an inconsistent egg gatherer.
I was pleased when mum started to buy eggs… and chicken from the grocery shop. Our chooks were scrawny and were not tasty. And I had to hold them while dad chopped off their heads. Then I had to pluck them.
I have much better experiences with eggs and chicken for dinner now that I am not on that farm! And since then, no fertilised eggs. Eggs kept in fridge at my place for past 40 plus years and no bad ones. And I don’t break them into a cup first unless I have to give them a beating before adding.