How long will it take for the results of Down's screening to come out?

Result time after Down's screening. Down's screening usually results in 7 days, because down's screening is done together with a certain sample size and can be taken after one week. Go to a pregnant woman who has been screened for Down's syndrome and need to draw blood on an empty stomach. The best time for Down's screening is 15- 19 weeks of pregnancy, but not after 19 weeks. Generally, older women suffer from Down's syndrome.