Meconium

Definition

Meconium is the earliest stool of a mammalian infant, composed of materials ingested during the time the infant spends in the uterus. It is typically thick, sticky, and greenish-black in color, and is usually passed within the first few days after birth.

Related terms

Amniotic Fluid: The protective liquid contained by the amniotic sac that surrounds and protects the embryo while it grows in the uterus.

Umbilical Cord: A tube-like structure that connects an unborn baby to its mother's placenta, delivering oxygen and nutrients while removing waste products from the baby’s blood.

Placenta: An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to your growing baby while removing waste products from your baby's blood