But fertilized eggs, as it turns out, are not better for you (and tastier) but also remain very much in the range of vegetarianism. (This information is also thanks to that article.) Fertilized eggs come from female birds allowed to roam around freely with male birds -- for up to a month after [bow-chica-wow-wow], female birds continue to lay fertilize eggs which, unless they go immediately under a heat source (e.g. the body of a lady bird), will not produce chicks. This means healthier eggs (less cholesterol than unfertilized counter-parts), happier birds (because they're not only moving freely but getting laid) and still a highly-unlikely-to-produce-a-multi-celled-organism final product. Everyone wins.
(Please, if I'm mistaken about this because of a set of not-hugely-fantastic eggs, let me know -- along with a recipe and/or address for a better place to try them).