Mazzymum, I also found that talking about it a lot and showing him pictures of babies in tummies from pg books helped. And letting him feel the baby move. Plus be sure to talk about mummy going away to hospital for a few days if you are birthing in a hospital. We forgot that bit and it was the only thing which threw my toddler. He was fine with the new baby but very shirty with me for being away for a few days (I had to stay in hossy for 5 nights as Tom was early and they wouldn't let him out). GL.