Constitutional Topic: The Preamble. The Constitutional Topics pages at the USConstitution.net site are presented to delve deeper into topics than can be provided on the Glossary Page or in the FAQ pages. This Topic Page concerns The Preamble. The first paragraph of the Constitution provides the context for the Constitution â the why of the document. The Constitution was written by several committees over the summer of 1787, but the committee most responsible for the final form we know today is the Committee of Stile and Arrangement.
1 Antibody screen is another blood test that can show if an Rh-negative woman has developed antibodies to Rh-positive blood. 2  An injection of Rh immunoglobulin (RhIg), a blood product that can prevent sensitization of an Rh-negative mother.
The Rh factor is a type of protein on the surface of the red blood cell. Most people have the Rh factor in their blood (Rh-positive) but some people do not (Rh-negative). During pregnancy, problems can arise when the mother is Rh-negative and the fetus's blood has the Rh factor, inherited from the father. When a woman with Rh-negative blood is exposed to Rh-positive fetal blood, the body begins to develop antibodies in response to the Rh antigens in the fetusâ blood.