Embryonic chromosome testing is primarily designed to rule out genetic disorders, such as the common trisomy 21, which is a congenital form of stupidity, meaning that the child develops abnormally and has a low IQ. The test can also rule out other chromosomal disorders, including autosomal and sex chromosome disorders. The embryo chromosome test costs 600-700 yuan for a single blood test for a couple, and more than 1,000 yuan for a double test. It takes 1-2 months for the test report to be issued, depending on the circumstances.