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.
Use a stopwatch to time how long it takes you to run a mile. Once you have an exact time - whether it's 8 minutes or 16 minutes - you can work on improving it! This is where running on a track comes in handy, as each 400M lap of the track is equal to 1/4 of a mile, so four laps of the track is equal to one mile.