> False positives can still be very harmful to patients (surgery, medication, lifestyle changes, etc) so they must be taken into account as well. Well yes, I w

> False positives can still be very harmful to patients (surgery, medication, lifestyle changes, etc) so they must be taken into account as well. Well yes, I wasn't suggesting jumping into treatment before verifying with the expensive, higher specificity test. Even with pregnancy, the impact of a false positive isn't huge when the next step is just to take another test - the same test that would've been done anyway if the first one wasn't available. Though the potential savings probably aren't great with pregnancy tests because they're already cheap, and I'd imagine the overall incidence for people taking the test is pretty high.