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.
If you are Rh-negative, your red blood cells do not have a marker called Rh factor on them. Rh-positive blood does have this marker. If your blood mixes with Rh-positive blood, your immune system will react to the Rh factor by making antibodies to destroy it. This immune system response is called Rh sensitization.Rh sensitization can occur during pregnancy if you are Rh-negative and pregnant with a developing baby (fetus) who has Rh-positive blood.In most cases, your blood will not mix with your baby's blood until delivery.h sensitization during pregnancy can only happen if a woman has Rh-negative blood and only if her baby has Rh-positive blood. 1  If the mother is Rh-negative and the father is Rh-positive, there is a good chance the baby will have Rh-positive blood. 2  Rh sensitization can occur.