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- No Not always a blood test is more accurate, but not necessarily more sensitive. A lot depends on the lab. A quantitative blood test, usually called a beta hCG test, measures the exact units of hCG in the blood. That means it will detect even the most minimal level. There is another type of blood test sometimes called a qualitative hCG. This is a test that simply gives a yes or no answer to whether you are pregnant. Just like urine tests, labs vary as to what is considered a positive pregnancy test. Common cutoffs for positive are 5, 10, and 25 units. A level under 5 is considered negative. A test that is only triggered at 25 units of hCG is not any more sensitive than several of the urine HPTs.
- Yes, urine tests test for hCG levels in women and A LOT of women have low hCG levels so the tests come out negative even though they are positive.
Wiki User
∙ 14y ago
Wiki User
∙ 13y agoA serum (blood) pregnancy test is not necessarily more accurate than a urine test, but results may be obtained sooner in the pregnancy with a serum test for hCG, the hormone that signals pregnancy. Both methods test for the presence of human chorionic gonadotrophin which is present in the blood about 48 hours after implantation has occurred. It takes about 4 days for hCG to show up in detectable levels in the urine.
Urine tests and serum tests are both highly accurate (about 97%) when performed correctly.
Serum HCG tests may detect a pregnancy 6-14 days after ovulation, depending on the time of implantation.
Urine HCG tests may detect a pregnancy 10 - 18 days after ovulation, depending on the time of implantation.
Wiki User
∙ 12y agoAlthough urine tests are almost 100 percent accurate, there could be something affecting the test that is not a pregnancy. Blood tests, are completely accurate, and i recommend anyone to get a blood test instead of a urine test, because they can tell right away if your pregnant, and it wont be something setting of the pregnancy test, when really it isn't a pregnancy, and it's always important to be absolutely positive.
- Nicole.
Wiki User
∙ 14y agoThey are, but there are drawbacks--they're more expensive, more intrusive, and it's harder to train a test administrator to draw a blood sample than it is to collect a urine sample. I can't see blood testing really catching on as the first choice of anyone--urine testing works well enough. Of course, if you are going to run a blood sample through your machine anyway, telling it to look for drugs too isn't much of a problem.
Wiki User
∙ 13y agoa blood test is highly more accurate then a urine test. doctors will usually give you a urine test after a blood test.
Wiki User
∙ 13y agoyes
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What is more effective a urine test conducted by a doctor or a blood test conducted by a doctor?
If the urine test is positive it is concidered to be as accurate as a blood test. However, blood test can detect pregnancy even after 7-10 days past conception. Blood test is always more SURE than urine test I would rely on blood test more! All the best!
Should I take a blood test for pregnancy testing?
Yes you should take a blood test. It is more accurate & can be taken sooner than a urine test.
Why is monitoring blood glucose levels more accurate that monitoring glucose levels in the urine?
The liver and pancreas release glucose right into the blood, therefore you will get a more accurate amount if you test your blood.
Is there any way to test your blood sugar other than taking a blood sample?
Yes, you can test your blood sugar through a urine sample. The sample is checked with a colored dipstick that measures the presence of glucose in the urine. The blood sugar test with the blood sample is more accurate and more conventional.
Can blood in your urine give you a positive result in a drug test?
If you have taken something to "flush" your system of drugs in urine, the blood might make the test still show up positive as blood tests give a more accurate report of your usage.
How can you be sure that you become pregnant?
You can get a blood test done, which is more accurate than a home urine test. Also, an ultrasound test can be done to actually see the pregnancy.
How can you get a bad urine test but hair test is clean?
Urine tests are more accurate than hair tests.
Can you be pregnant if you had 4 neg home preg tests and 1 doctor that said you are not pregnant based on a blood and urine test and one doctor that said inconclusive based on a urine test?
As you had a blood test, you are definitely not pregnant. The blood test is 100% accurate.
Why would a doctor take a blood test to determine pregnancy?
They take a blood test so they can see what your hcg levels are. Your levels get higher the farther along you are. A blood test can determine pregnancy alot sooner than a urine test and is also more accurate.
Why urine is the best way to use in drug testing?
A blood test would actually be more likely to be more accurate, but urinalysis is more cost effective and easier to accomplish. It also requires very little training, which is different than a blood test.
Is a blood test 100 percent accurate in determining pregnancy?
For most women yes. There are a few women who are pregnant with a negative blood and urine test. But very few.
HCG is measured in urine or blood?
The presence or absecne of HCG (human chorionic gonadotropin) can be measured in both the urine and in blood. Quantitative analysis (showing the rising levels of HCG as pregnancy progresses) can only be done in blood.
