Sickle cell disease occurs from genetic changes that cause abnormalities in hemoglobin molecules: 1  Hemoglobin A (HbA) . 2  HbA is the hemoglobin molecule found in normal red blood cells during childhood and adulthood. 3  People who do not have sickle cell disease generally have this type of hemoglobin in their blood cells.ickle cell disease is an inherited blood disorder in which the body produces abnormally shaped red blood cells. In sickle cell disease, the hemoglobin in red blood cells clumps together. This causes red blood cells to become stiff and C-shaped.
A few new pregnancy symptoms will be noticed with the rise and fall of hormonal levels when you are 2 months pregnant. Your waistline is increasing even though you have not put on any significant weight. There is a change in the texture of the hair and skin during pregnancy.
Answer: We talk a good game about having nine months of pregnancy. But if you look at it mathematically, there are an average of 40 weeks in a normal pregnancy. If you calculate a month as being four weeks, that makes 10 months of pregnancy in every 40 weeks. The problem with this calculation is that it has 28 day months, which is not the norm in our calendar months. There is also the issue of when you actually are pregnant.