What is meconium?

Baby poop : Meconium is when the baby has a bowel movement while still inside the uterus. It is more common in pregnancies that go beyond the due date. In most cases it does not cause problems but it can be a sign of a baby in distress. In some cases, the baby inhales it which causes meconium aspiration syndrome.

Fetal bowel movement: Sometimes if the fetus is under stress it can have a bowel movement inside the uterus. This is called meconium.

Baby poop: When the baby is under stress in the last month of your pregnancy, he can poop in the amniotic fluid. If you break your bag of waters before labor, and see greenish/greyish fluid, go on in to the hospital or your doctor's office and have them check to see if it's meconium. As long as you're in the hospital for delivery, there's no worry. The nurses or doctors will check the baby at birth.

Swallowed AF, cells: As a fetus grows, its organs and systems mature in preparation for functioning after birth. One such system is the gastrointestinal GI system. A fetus swallows amniotic fluid and its contents through pregnancy, and the "end" product literally is meconium, a dark green slimey substance. If baby's near term, it might pass a little and be ok. If early or stressed, it could breath it in and need help.

Newborn Poop: The very first stools a baby has are not like anything you have seen before if you haven't seen a newborn's first poop. This very different stool is called meconium. It is usually very dark greenish-black, very thick and slimy. It tends to stick to your baby's butt, and is sometimes challenging to even wipe off. But within a day or two, the poop changes to normal newborn stools.