Blood tests to determine gender

Has anyone had done blood tests through Nimble Diagnostics in Australia to determine baby's gender. It is a DNA based test completed at home and sent to lab. This test can be completed as early as 7 weeks post conception.

Also does anyone know how this differs to the prenatal tests completed in first trimester that screen for abnormalities such as Down's syndrome plus others and also confirm baby's gender. This test is done from 10 weeks onwards.

Any information would be greatly appreciated.

Just use MaterniT21 or Harmony. They are reliable and can be used with accuracy and also test for genetic issues.