The U.S. infant mortality rate generally declined throughout the 20th century, from 100 infant deaths per 1,000 live births in 1900 to 6.89 infant deaths per 1,000 live births in 2000.
hemoglobinopathies are genetic inherited disorders of hemoglobin the oxygen carrying protein of the red blood cells the hemoglobin molecule is composed of four separate polypeptide chains of amino acids two alpha chains and two beta chains as well as four iron bearing heme groups that bind oxygenemoglobinopathies are genetic inherited disorders of hemoglobin the oxygen carrying protein of the red blood cells the hemoglobin molecule is composed of four separate polypeptide chains of amino acids two alpha chains and two beta chains as well as four iron bearing heme groups that bind oxygen
People with hemoglobin C trait inherit a normal hemoglobin gene (Hb A) from one parent and hemoglobin C gene (Hb C) from the other parent. These people produce both hemoglobin A and hemoglobin C. Persons with hemoglobin C trait are also known as hemoglobin C carriers. Hemoglobin C trait is not a disease.