The main one I have heard is empathy, but also a drop in selflessness (as in valuing your own discomfort over the potential life inside of you), and commitment

The main one I have heard is empathy, but also a drop in selflessness (as in valuing your own discomfort over the potential life inside of you), and commitment (I have heard it linked multiple times to be increase in divorce rates, aka commitments are not treated seriously.) I'm not saying I agree with any or all of these, just I've heard them.