Pittsylvania County Service Authority PO BOX 209 Blairs, VA 24527-0209: Phone: 434-836-7135 Fax: 434-836-7139 Emergency Contact: 434-432-7931. Email Address: pcsa405@comcast.net Physical Address 405 R & L Smith Drive Danville, VA 24540 Click here for directions
Hemolytic disease of the newborn, also known as hemolytic disease of the fetus and newborn, HDN, HDFN, or erythroblastosis fetalis, is an alloimmune condition that develops in a fetus, when the IgG molecules (one of the five main types of antibodies) produced by the mother pass through the placenta.
A thin-walled hollow structure in early embryonic development that contains a cluster of cells called the inner cell mass from which the embryo arises. The outer layer of cells gives rise to the placenta and other supporting tissues needed for fetal development within the uterus while the inner cell mass cells gives rise to the tissues of the body.