Oh my goodness, I've been doing this over the last week and thought I was crazy. Well, maybe I still am but not just for this reason! Okay so lets take this one step further. For those whom do talk to their eggs, do you see a correlation to them recognizing your voice once they hatch?
We're all a little nutty around here I'm not sure we would be able to tell any difference if we did or didn't talk to them before hatching. I know mine recognize my voice now, but I don't know exactly "when" they started recognizing it. I have a special whistle that I do for my ducks when I walk out my back door. If I don't do it, they kinda go ballistic, like something is coming after them. But if I do it, they seem more calm. And I tell them "its just momma, calm down"... lol