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Because the urine test might be more sensitive than the hormone specific blood test. 2) A blood test is searching for the substance itself. The liver metabolizes the substance and sends it on to the kidneys in the form of metabolites. It is entirely possible that the liver has completely metabolized a substance, but it is still showing up in the urine as the metabolite. (Think drug tests, for example).
What else can I help you with?
Got tubes tied and urine tests positive blood test negative what do you think?
Stop taking more urine tests. Repeat the blood test in two weeks.
Pregnancy blood test is positive but the urine is negative?
A serum hCG will be positive for pregnancy at 25mIU/ml, the urine test, although just as accurate needs a stronger concentration of 50mIU/ml to 100mIU/ml depending on the brand - this means the serum (blood) test will test positive 2 to 3 days sooner than urine.
Can you test positive with a urine pregnancy test and negative on the blood?
Yes, it is possible to have a positive result on a urine pregnancy test and a negative result on a blood pregnancy test. This could be due to differences in the sensitivity of the tests or the timing of the tests relative to the hormone levels in the body. It is recommended to confirm with a healthcare provider for further evaluation.
Can you get a negative urine pregnancy test even if a blood test comes back positive?
I have just this minute come back from the doctor. My urine test was negative but my blood test was positive. I have been told that my HCG levels are extremely low therefore producing a negative urine test. I was also told that I am either 1-2 weeks pregnant or that I am in the process of a miscarraige. I had an internal exam and my cervix is closed which is a good sign! I would suggest to you if you had the same thing happen to wait a few days and go back and have both tests done again to see where your levels are at. Either way, keep a close eye on it. Hope this helps.
If i have got a coil the hpt test is positive but the doctors blood test is negative and i have all the symptoms of pregnancy can i still be pregnant?
sometime hpt gives false positive... if you took a doctor's urine pregnancy test and came back negative then ask for a blood test--a blood test will tell you if you are pregnant or not- even if you have low hcg in your urine-and yes you could still pregnant with all the symptoms---best of health
Can blood test positive for meth during a urinary test?
There is no blood tested in a urine test.
If a urine test is positive for cocaine can another test be negative?
not very likely
Does a positive urine test show faster than a negative urine test?
Yes, a positive testing urine test will show faster than a negative urine testing.- Personal experience (I have had many urine tests) use "sure jell" and you will pass everytime!!!!! look it up on google.
Can a urine pregnancy test keep showing negative but be positive on a blood test and be pregnant?
Yes. I don't know how but it can happen. I cannot use the urine preg. tests , I have to have the serum and then it has to be the quantitate not the yes or no one.
Why would a urine test come out positive before taking and negative after taking antibiotics for a bladder infection when you are on Mircette Birth Control and started your period a week ago?
Bladder infections can spread into your kidneys and then into the blodd stream so they were probably checking to see how far it had progressed. I dont know if you understood my question, i know why they took the urine and blood samples. But i dont understand why a pregnancy urine test would say positive 3 times, pregnancy blood test say negative twice, and then another urine test done 6 hrs after being administered antibiotics come out negative. What was with that first urine test saying positive?
Is it possible to be 10 weeks pregnant and get a negative urine test if you do?
Some women do not get a positive pregnancy test will late in their pregnancy , if even. A blood pregnancy test is the best way to go.
You thought you might be pregnant so you went to your doctor and took a blood test and it came back negative How soon after firtilizaation does a blood test become positive?
Usually it's a "urine" test. It's fast. Never heard of a blood test for pregnancy.
