Autoimmune disease and chronic lymphocytic leukemia: autoimmune hemolytic anemia, pure red cell aplasia, and autoimmune thrombocytopenia. Diehl LF(1), Ketchum LH.Author information: (1)Department of Medicine, Walter Reed Army Medical Center, Washington, DC 20307-5001, USA.utoimmune disease and chronic lymphocytic leukemia: autoimmune hemolytic anemia, pure red cell aplasia, and autoimmune thrombocytopenia. Diehl LF(1), Ketchum LH. Author information:
A premature baby is one who is born too early, before 37 weeks. Premature babies may have more health problems and may need to stay in the hospital longer than babies born later. They also may have long-term health problems that can affect their whole lives. About 1 in 10 babies is born prematurely each year in the United States.
In other words, a premature birth is one that occurs before the start of the 37th week of pregnancy. Normally, a pregnancy usually lasts about 40 weeks. Premature birth gives the baby less time to develop in the womb. Premature babies, especially those born earliest, often have complicated medical problems. Depending on how early a baby is born, he or she may be: Late preterm, born between 34 and 36 weeks of pregnancy.