Blood Drug Testing

How accurate are blood tests when it comes to pregnancy?

my girlfriend just had urine tests and blood tests done, which came up negative. They are now doing a female exam on her, is there a chance she could be pregnant?

Public Comments

1. WAYYY more accurate than the pee tests!
2. very. blood tests are deff.
3. it's better than pissing on a stick
4. Very accurate.
5. She's not pregnant. If both urine and blood were negative, she's not. Blood tests are extremely accurate.
6. i would guess well over 99%
7. VERY! They test for hcg the pregnancy hormone, there are certain levels for each day u are pregnant so it is very accurate, pretty much fool proof!
8. some ovarian cysts can give the impression of the pregnancy hormone in the blood tests. But the blood pregnancy tests are usually very accurate
9. they're very accurate ! so no , shes not pregnant .
10. very VERY accurate, they're much more accurate then the pee test thingys(lol)
11. it is about 95% accurate...the PT test that you can buy anywhere is about 90% accurate.
12. They are very accurate but not 100%. The blood test can be wrong depending on the dates. The main cause for a negative test when you are in fact pregnant is a miscalculation in dates. Some women have slightly lower hcg numbers which is what the blood test checks for so if she is off by a few days she could be pregnant. But that is very rare.
13. The blood test is very accurate. If shes pregnant it should have come up in the blood test.
14. very accurate. they did mine 3 days after i mised my period and she called me "CONGRATS!!!!"