Meconium is a thick substance that lines a baby’s intestines in the womb. A baby usually passes meconium after birth, but if they pass it early, the amniotic fluid may become meconium-stained.

OBJECTIVE: Numerous studies have assessed the significance of meconium-stained amniotic fluid (MSAF) at term. However, to date, there has been very little documentation on the incidence and ...

Meconium staining is found in the amniotic fluid in about 12%-20% of baby births and is more common if delivery happens after your due date. Having meconium-stained amniotic fluid can cause ...

Meconium aspiration is "when babies breathe in meconium-stained amniotic fluid before or during birth," Dr. Cowan says. Meconium aspiration syndrome is rare, occurring in 5 to 10 percent of births ...

If a baby’s amniotic fluid is stained with meconium, it may lead to MAS in up to 10% of babies. Additional medical care may be needed to address breathing issues or infection.

Meconium-stained amniotic fluid occurs in 7 to 22% of term deliveries. In anywhere from 2% to more than a third of these deliveries, MAS can occur.

Meconium aspiration is "when babies breathe in meconium-stained amniotic fluid before or during birth," Dr. Cowan says. Meconium aspiration syndrome is rare, occurring in 5 to 10 percent of births ...

Amniotic fluid is typically colorless or slightly yellow. Sometimes, the fluid looks green or brown. This happens if the baby passes its first bowel movement in the womb, a process known as meconium .

Unborn babies can poop in the womb. They pass a substance called meconium, which goes into the amniotic fluid. If a baby ingests meconium on delivery, it can have health consequences. Meconium is ...

In approximately 5% of infants with meconium-stained amniotic fluid, meconium aspiration syndrome develops; in 9.6% of patients with meconium aspiration syndrome, a pneumothorax develops. 1,2 On ...