I have some vegetarian friends who eat eggs, and claim they are not fertilized so it is fine. I really do not understand what is it that we need from egg. Protein? Cholesterol? Or maybe B12. But B12 in egg is pretty low - about 0.6 mcg - even if you eat 3 eggs a day, it's still not sufficient to meet the daily requirement. Sometimes I think it may be the deception that the society insisted we follow otherwise we don't feel comfortable: "eat a little bit of animal products! You will be missing something from just plants alone." Well perhaps in the 1800s or earlier. Nowadays there are fortified foods and supplements for everyone, even for vegans. And yet, all the more we are worried about a deficiency compared to the past.
Anyway, I digressed. About eggs, there is something called parthenogenesis if you have not yet known... Basically, unfertilized eggs can hatch via this route. Well, maybe an embryo isn't really alive someone says, and besides many cases it don't survive to the stage where it's got the features of a chick. Alright... then you have to see the picture below.
This is what happens when we support the egg industry by our consumption of eggs. It will happen whether the eggs we eat are fertilized or not, because egg-layer hens need to be replaced when they are worn out. To introduce young hens would mean hatching eggs and selecting only those that give females. The chance to get female is almost 50% / 50% so the rest of the males are grounded and very likely placed into pet feed.
"Hundreds of thousands of baby male chicks are either ground up alive or discarded like trash to die more slowly, piled by the hundreds, even thousands, on top of one another in bins every single day in order to satiate the egg and chicken-meat industry. The majority of male chicks are basically useless to both industries, so they are considered to be “trash”. I can not tell you how hard I’ve cried watching documentary video of countless live baby chicks, freezing to death in garbage bins out in the winter cold. So, which is the more brutal scenario? Is there a more brutal scenario?" ~ Anthony Damiano on the realities caused by the consumption of chicken-based products.