March 12, 2010
How long after implantation would a blood pregnancy test become positive?
Let me explain my situation. I started my last period on March 27. I would have been ovualting around April 7 and 8. I went to the Dr. on april 13 and she did a blood pregnancy test I just called and got the results and it was negative. I asked the receptionist who answered the phone if it was to soon to tell even by a blood test (I wouldn't even be a week pregnant) and she said no, that you can tell with in days from a blood test - that is how she found out. Now I have read on many different sites that it takes 10-14 after conception even for a blood pregnancy test. How long have you heard that it takes for a blood pregnancy test to read accurate?
Thanks for your help
Filed under Pregnancy Tests by on Mar 12th, 2010. Comment. 
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Comments on How long after implantation would a blood pregnancy test become positive?
sometimes it takes a good couple of weeks
Sounds like you’ve found the answer already.
It varies for each person. I think it was too soon for you. I had a blood pregnancy test when I was a 5 weeks along and it came up negative. I didn’t get a positive blood test this time around until I was almost 8 weeks pregnant, with an ultrasound to determine the due date because of the first negative blood test. Try waiting a couple of weeks to see if you have started a cycle, if not, make another appt with your Dr to have another blood test done. Other wise try a hpt with your first urine of the day. I had an hpt tell me I was pg before I had a positive blood test.
i wanted to do the blood test when i thought that i was 2 weeks pregnant,but the doctor told me that i have to wait at least until my next period was due and late for few days cause whatever test you do before that time will show negative.