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.
If however you are asking about a running track the answer is 4 laps for a standard 400m (440 yard) and 8 laps (220 yards) for a standard indoor track. It depends on the length of the lap. Modern running laps are 400 meters, and in that case one mile is: