Twenty-nine months ago (although it seems a lot, LOT longer) I wrote a week 16 for Tom - so it's only fair that I do the same for you. In fact, I can even load your week 13 scan, just as I did for your big brother:

Aww ... I had forgotten how much these pictures mean to me! Only another few weeks until we get to have another look at you - and learn a little bit more about what you have in store for the next stage of our parenting journey. I can't wait.