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How accurate is a pregnancy blood test?

By Anonymous May 5, 2017 - 6:51pm
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A few months back I had engaged in a physical activity and was afraid of possible pregnancy so I got some tests done. Following the activity, my period had slight variants so I decided to do a home pregnancy tests. I got a few of them done and all were negative, but I still wanted to be a sure as I had come across articles and posts online of how a urine pregnancy tests might now work for every women. So then I got a quantitative serum blood test done and the result was negative. The doctor didn't tell me the exact number, but he said I can stop stressing and focus on other things in life and if I decided to engage in something like this, use a protection next time so you don't have to stress. So it goes to say that the test was negative.

After the blood result I stopped thinking and stressing about pregnancy. But it's all coming back now because I'm not suppose to get my period till May 14th, but I got it today!

So is there any chance that even the blood test could give wrong results after 25 weeks!?


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Hi, Anon.

Your doctor gave you good advice. Firstly, if you had/have your period, you are not pregnant. Plus, you had various negative test results.

Urine tests or home pregnancy tests are around 97% accurate when done correctly (and not taken too early).

The advantage to having a blood test is that it can detect pregnancy earlier than a urine test at about 7-12 days from possible conception. If a negative result is received, the test may be repeated if a period is missed. They are considered highly accurate.


May 6, 2017 - 4:44am
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