If he breastfed or on formula? If he's bf'ing, it's very normal for ebf babies to go several days without pooping. It's because they use up the breastmilk so efficiently that there is not as much waste produced. If you are nursing, the site www.kellymom.com has a lot of good information about bf'ing and dirty diapers and what is normal and when to be concerned.
If he is ff'ing, it can be a sign of constipation and I would give your doctor a call to see what he/she suggests. HTH!
at 12:43 PM on Feb. 8, 2009