âThereâs called free circulating DNA, the fetus, some of its DNA gets into the maternal blood and we can actually detect that DNA -- the accuracy of these tests are about 99 percent,â Dr. Abdullah said, âWe can do this test around 10 weeks, so itâs very early in the pregnancy.â.
Daytona International Speedway is 2.5 miles (4 km) long and a 500-mile race requires 200 laps to complete. However, the race is considered official after half its distance (100 laps or 250 miles (400 km)) has been completed.
A specific type of automobile racing, stock car racing, is found mainly in the United States. The stock cars race around an oval track which is approximately 800 meters (Â½ mile) in length. Races are usually 320 to 970 kilometers (200 to 600 miles) long.