1 Use a small screwdriver to press the spline into the corners as necessary. 2  As you press the spline into the frame it will make the screen taught. 3  Once installed, trim the excess screen material with scissors or a utility knife.
In normal pregnancy the mean fetal haemoglobin increases linearly from 11 g/dl at 17 weeks' gestation to 15 g/dl at 40 weeks' gestation and one standard deviation is approximately 1 g/dl. The haemoglobin was also measured in fetal blood from 154 red cell isoimmunised pregnancies from 17 to 36 weeks' gestation.
Hemoglobin is a molecule comprised of four subunits. Each subunit contains an iron containing pigment (heme) and a protein (globulin). There are two types of subunits, alpha and beta. Each gram of hemoglobin can carry 1.34 ml of oxygen.The oxygen carrying ability of blood is directly proportional to its hemoglobin concentration.emoglobin also serves as an important pH buffer in the extracellular fluid. 1  Normal hemoglobin values are: 2  Adult: (males): 13.5 - 17 g/dl. ( 3 Females): 12 - 15 g/dl. 4  Pregnancy: 11 - 12 g/dl. 5  Newborn: 14-24 g/dl 77% of this value is fetal hemoglobin, which drops to approximately 23% of the total at 4 months of age.