The nurse helps a breastfeeding mother change the diaper of her 16-hour-old newborn after the first bowel movement. The mother expresses concern because the large amount of thick, sticky stool is very dark green, almost black in color. How should the nurse respond to this mother's concern?

A. Asking the mother what she ate at her last meal: The appearance of the first stools in a newborn is not influenced by maternal diet. Meconium forms in utero from intestinal secretions, bile, and cellular debris, so maternal intake does not alter its color or consistency. B. Suggesting that the mother ask her pediatrician to explain newborn stool patterns to her: While consulting the pediatrician is always an option, the nurse is responsible for providing immediate education. Deferring the explanation unnecessarily delays reassurance and teaching at the bedside. C. Telling the mother not to worry because breastfed babies have this type of stool: Breastfed newborns usually transition to yellow, seedy stools after several days. The first dark green or black stools are not specific to breastfed infants and need proper identification to avoid misunderstanding. D. Explaining to the mother that the stool is called meconium and is expected of all newborns for the first few bowel movements: Meconium is the newborn’s initial stool, composed of intestinal secretions, bile pigments, and amniotic fluid. Its thick, sticky, dark green-to-black appearance is normal in the first 24–48 hours of life and serves as an expected, reassuring finding.