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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Meconium aspiration syndrome is the most common cause of respiratory distress among neonates born in Cheluvamba hospital followed by hyaline membrane disease.
Meconium stained amniotic fluid (MSAF) is an alarming sign of fetal compromise and associated with a poor perinatal outcome.
Meconium Stain###11(64.7)###21(11.5)###14.14 (4.73-42.2)###<0.01###9.35 (1.98-44.21)###0.005
Knowledge and Perceptions on Meconium. Mothers were asked to describe the baby's first stool (meconium) in terms of colour, smell, and texture.
In this work the ion chromatography method for determining thiocyanate in meconium samples collected from the newborns whose mothers were exposed to different tobacco smoke levels, as well as the obtained research results, are presented.
In the study by Wing et al., 8.8% patients in the misoprostol group demonstrated thin meconium and 19.2% patients demonstrated thick meconium at the time of delivery.
None of the baseline characteristics like sex, birth weight, gestational age, mode of delivery, and consistency of meconium were significantly associated (P > 0.05) with occurrence of feed intolerance in our study subjects with meconium stained liquor.
The patient had normally descended testes and did not have any difficulty in the neonatal nursery, such as delayed passage of meconium or signs of bowel obstruction.
The significance of isolated amnion necrosis (81) has not been independently confirmed, yet but most cases of amnion necrosis are meconium-induced (very common), whereas focal necrosis of the media of umbilical arteries of the umbilical cord is a rare response to meconium. (1,82) Laminar necrosis of the decidua basalis has been also described.