Currents move ocean water horizontally at the ocean's surface. Surface currents are driven mainly by the wind. Other forces such as the Coriolis effect and the location of landmasses do affect surface current patterns. The Coriolis Effect explains how the earth's spin causes the wind to curve.
The first blood test is done by taking a small amount of blood from your arm from 10 weeks to 13 weeks 6 days in pregnancy. Nuchal translucency ultrasound: The second step for Sequential Integrated Screening is a special ultrasound done from 11 weeks 2 days to 14 weeks 2 days of the pregnancy. This ultrasound measures the size of the nuchal translucency (NT) of the fetus.
When should the test be done? The test is usually done between 14 and 20 weeks ofpregnancy. How is it done?When should the test be done? This test is done between 11 weeks, 3 days and 13 weeks,6 days of pregnancy.Nuchal translucency screening can also be done jointly with first trimester serum screening (blood test).It measures two hormones called the free beta HCG (human chorionicgonodotrophin) and PAPP-A (pregnancy-associated plasmaprotein-A).t is done throughIt is done though an abdominal ultrasound scan. an abdominal ultrasound scan tomeasure the nuchal translucency together with a bloodtest (about 5ml) to measure the two hormones (free HCGand PAPP-A). 3.Triple Test or Triple-marker Test This is a screening test for Down syndrome.