• Sterile bowel contents of fetus which are expelled in first stool
  • Composed of materials ingested in-utero: intestinal epithelial cells, lanugo, mucous, amniotic fluid, bile
  • Viscous, sticky, tar-like, dark in color

Cases of Meconium

Clinical image of meconium plug
Clinical image shows a contiguous plug of meconium that was expelled by the patient after a water-soluble contrast enema.