Guided by ultrasound, your doctor pinpoints the spot where the umbilical cord meets the placenta. He then inserts a needle through your abdomen and uterus and into the umbilical cord and withdraws a small amount of fetal blood.
© 2011 University of Maryland Medical Center (UMMC). All rights reserved.
UMMC is a member of the University of Maryland Medical System,
22 S. Greene Street, Baltimore, MD 21201. TDD: 1-800-735-2258 or 1.866.408.6885