Newborns pass a dark green or black stool called meconium, an aggregate of everything they consumed in the womb. If your baby is exclusively breastfed, her poop may be yellow or slightly green and have a creamy consistency. It may be runny enough to resemble diarrhea.

There are many shades of normal when it comes to breastfed poop. One you might see is a greener hue, which could signify that you ate something different than you normally do. Breastfed babies pass green poop sometimes if their moms eat a lot of leafy greens, purple or blue-coloured food, and certain medicines. If your baby isn't experiencing any other symptoms, there's no need to worry.