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A greenish mass of mucous, desquamated epithelial cells, lanugo, and vernix caseosa that collects in the fetal intestine, becoming the first fecal discharge of the newborn.



the normal feces of the newborn.

Meconium is formed in the intestinal tract of the fetus and is excreted at birth and for a day or two thereafter. It consists of an odorless, dark-green, homogeneous mass of secretions of various sections of the digestive tract, desquamated epithelium, and swallowed amniotic fluids. By the fourth or fifth day after birth the meconium is replaced by the normal feces of the nursing infant.

References in periodicals archive ?
Meconium in the peritoneal cavity initiates sterile, chemical foreign body peritonitis and causes foreign-body giant-cell reaction, chronic inflammation and, finally, scarring.
1) Meconium is the earliest stool passed by an infant and is composed of materials ingested while the infant was in the uterus.
The imaging findings in a newborn with an ongoing bowel perforation, resulting in gross meconium ascites, is presented below.
Meconium was not collected from 14 neonates, 3 for whom only milk stool samples were available, 6 for whom meconium samples were discarded by mistake, and 5 who were not delivered at the recruitment hospital.
But dad Paul Young said: "We are concerned about the length of time it took to call for assistance, if you had been aware of the meconium and the loss of her heartbeat.
The meconium aspiration causes brain damage so we just have to take it day by day to see if there's any effects of brain damage but at the moment the doctors are pleased with his progress.
It's possible to use meconium analysis to test for excessive maternal alcohol intake by measuring fatty acid ethyl esters, conjugates of alcohol with fatty acids, which stay in the meconium of the baby.
2003; 88:F98-F100), we found that meconium was somewhat more sensitive than hair samples of newborns for detecting cocaine and cannabis, and found a significant correlation between hair and meconium levels of cocaine, cannabis, and opiates.
Meconium as a biological marker of prenatal exposure.
Several studies have used meconium to measure concentrations of fatty acid ethyl esters (FAEEs), one promising biomarker of prenatal alcohol use (Bearer et al.
While still in the womb he had inhaled meconium, the substance that lines the bowel of an unborn baby.