How far along do you have to be before a blood test at the doctors will come up Positive?

Question

How far along do you have to be before a blood test at the doctors will come up Positive? This meaning both quantitive and qualititive. Thanks :)

Answer 1

I think as soon as you test positive for a home pregnancy test, a blood test can be taken on your first appointment. But call your doctor to find out. I had my blood test when I was 5 weeks and found out I was pregnant when I was 3 weeks.

Answer 2

as soon as you think you are pregnant. The blood test is more accurate and it picks up the HCG hormone as soon as you become pregnant. The early you are the lower your HCG level will be but the levels are their. Which if you were not pregnant that hormone would not be picked up in your blood at all.

Answer 3

Usually only a week or so. The hormone shows up in the blood stream faster than in the urine.