fetal hemoglobin

n.
  1. The predominant form of hemoglobin in a fetus and a newborn. Normally present in small amounts in an adult, it may be abnormally elevated in certain forms of anemia.Hemoglobin F
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.