No, Catholics are possibly the most consistent religion in unanimously agreeing life begins at fertilization. (Which, eggs you eat aren't fertilized anyway.)
They don't baptize stillborn "babies" because they don't believe in baptizing dead people, as it's just a body at that point, no longer a complete person. Plus they believe since there was no opportunity, there is a way to heaven for them in the afterlife.
I've only heard the "first breath" thing in a few modern sects of Judaism.
It was originally the Latin word "carnis". They invented the fast from meat specifically to mean giving up the best food of, like, beef and chicken. When translated into English, "meat" was the best word they had to refer to the concept of land animal meat.