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.
40 weeks is about 9 months and 1 week (9.2 months). Actual gestation (from conception to birth) is just under 9 months. Whether or not a baby is premature depends more on its size and weight than how many weeks along the mother is in the pregnancy. When referring to length of pregnancy, if a baby comes early (generally before about 36 weeks) it is best referred to as pre-term. This means that a baby could be pre-term but not premature.