A–Z Glossary

Weight nadir

A weight nadir is the lowest point in a newborn's early weight pattern, commonly occurring around days two to four.

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Birth Weight Loss and Regain in the First Weeks

Birth Weight Loss and Regain in the First Weeks

Why weight loss occurs after birth Newborn weight loss after birth reflects several normal physiologic processes. A baby is born with extracellular fluid that is gradually redistributed and excreted, and the first stools and urine contribute to the early decline. Feeding volume is initially small because colostrum is produced in limited but concentrated amounts; mature […]