How accurate are qualitative pregnancy blood tests?
Qualitative blood tests for pregnancy are able to determine pregnancy beginning around the first or second week after conception. This is much earlier than urine tests, and they are more accurate than urine tests as well. After the Henry Ford Hospital tested blood tests against urine tests and found them to be more accurate, the hospital switched policy and now relies on blood tests, such as the qualitative test.Source:Doctor’s Guide: ACEP: Urine hCG Tests May Miss Early PregnancyBaby Hopes: Is A Blood Test For Pregnancy More Accurate Than A Urine Test?