"Dark green is actually the right color for newborn poop," says Chandani DeZure, M.D., a pediatrician and member of the BabyCenter Medical Advisory Board. Meconium – your baby's first poop ...

If you've spotted mucus in your little one's diaper, here's what it might mean – and when to check in with a doctor.

After that, most newborns have stools the color and consistency of mustard ... Diarrhea can be more difficult to detect because a baby's stool is naturally loose and unformed.