What’s a normal baby poop looks like?

Within 24–48 hours of birth, your baby should produce its first dirty nappy, and for the first 2–3 days a new baby’s poo can range from something like black Marmite tar to dark green sludge. This is called meconium and it is the amniotic fluid debris (e.g. bile and mucous), which had accumulated in its intestine before birth. It’s pretty sticky stuff and looks so freaky, but it is odourless.  Then, as the digestive system gets used to functioning, they go to a transitional greenish-brown, guacamole-ish, batterlike poo. Then on to mustardy golden-yellow mango colour by the fifth day. Then on to mustardy golden-yellow mango colour by the fifth day.