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Doctor insights on: Can You Use Blood On A Urine Pregnancy Test

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Can you use blood on urine pregnancy test?

Can you use blood on urine pregnancy test?

Yes you can: Many times if there is no urine, your physician or nurse may use your blood for this test. The test is based on color reaction towards the HCG and will tell you positive with a line when the chemical is indeed present. A laboratory run test can then be used to confirm the test if needed. ...Read more

Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


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Can u use blood instead of urine in a normal urine home pregancy test?

Can u use blood instead of urine in a normal urine home pregancy test?

No: Home pregnancy tests kits are designed for testing urine only. Use first morning urine and do the test 4-5 days after a missed period. ...Read more

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Can I drop blood on a urine pregnancy test and still get accurate results? If not, where can I get a blood pregnancy test?

Can I drop blood on a urine pregnancy test and still get accurate results? If not, where can I get a blood pregnancy test?

AT the clinic: At your doctor's office; at the community health center serving your county. At planned parenthood. No. Do not put blood on the urine pregnancy test. Put urine on the urine pregnancy test. But, only after a period has been missed. Not before. ...Read more

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How soon can you get a positive on a urine pregnancy test & blood pregnancy test?

How soon can you get a positive on a urine pregnancy test & blood pregnancy test?

Preg test: Home pregnancy tests are very accurate. They are the same tests used in a doctors office. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period. If you doubt the result you can repeat it in 1-2 days. If you were pregnant the hormone level would rise enough for detection. ...Read more

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What would be the reason I would need a blood pregnancy test over a urine pregnancy test?

What would be the reason I would need a blood pregnancy test over a urine pregnancy test?

More accurate: Both tests search for HCG or human chorionic gonadotropin, the hormone produced by the fetus.

A blood pregnancy test will tell you the exact level of the hormone and can be detected at much lower levels, therefore giving an earlier result. A urine pregnancy test is only positive or negative

the quantity of HCG in the blood pregnancy test can also help determine how far along the fetus is. ...Read more

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I took a urine pregnancy test every week for 3 wks. Negative. 2 days ago I took a blood test hCG was 64. Today my urine test showed positive.?

I took a urine pregnancy test every week for 3 wks. Negative. 2 days ago I took a blood test hCG was 64. Today my urine test showed positive.?

Congratulations!: You are not very pregnant but just so but you are. You were not pregnant those other times. They were not falsely positives with a 64 now! ...Read more

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Is a urine pregnancy test and blood test enough to find out if your pregnant or not? Her period is due tomorrow she took both test and it came out negative

Is a urine pregnancy test and blood test enough to find out if your pregnant or not? Her period is due tomorrow she took both test and it came out negative

Probably: If both assays were negative then she is unlikely to be pregnant. If her period were to be 5 days or more late you could consider getting a repeat HCG determination. ...Read more

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If embryo isn't connected to maternal blood supply until 7days post conception, this would mean hCG isn't yet produced for a urine pregnancy test?

If embryo isn't connected to maternal blood supply until 7days post conception, this would mean hCG isn't yet produced for a urine pregnancy test?

No: The embryo can produce HCG as early as 5 days post fertilization but the amounts are so small and the maternal-fetal blood connections are so minimal that not even a blood test can pick it up, let along a urine pg test that is not positive until your HCG levels are 20 iu/ml or more. You should, however, be able to pick up HCG in a blood test as early as day 9 post ovulation but the levels are low. ...Read more

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I had a urine pregnancy test done at my family doctor and the result was a weak positive and the blood test was negative. What does this mean?

I had a urine pregnancy test done at my family doctor and the result was a weak positive and the blood test was negative. What does this mean?

Urine misread: Probably the urine was misread or a strip that was truly unequivacle or read as "weak positive." in theses cases a confirmatory blood test was performed appropriately which was negative. If your period does not come, you can repeat the blood test in 2 weeks to be safe, and then await for the next period, if that does not come. Get secondary ammenorhea work-up. ...Read more

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Can smoking tabacco affect a blood and urine pregnancy test?

Can smoking tabacco affect a blood and urine pregnancy test?

Yes and No: Smoking tobacco is the intentional inhaling of smoke from burning organic material plus whatever chemicals have been added, and is thus toxic to life. A couple who smokes has decreased fertility than if they did not smoke, and therefor will have a higher likelihood of negative pregnancy tests compared to if they did not smoke. The actual test, however, is just as accurate regardless of smoking. ...Read more

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What causes a urine & blood pregnancy test to be inconclusive?

What causes a urine & blood pregnancy test to be inconclusive?

One possible: Reason is if the woman is pregnant but the HCG level is just not quite high enough to trigger a positive result. ...Read more

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Hi I have a question...well actually several questions. I'm pretty sure I'm pregnant, I've been to the doctors twice and each time I've done pregnancy test, one urine one blood, both negative. Also because the test came out negative the doctors wouldn't ac

Hi I have a question...well actually several questions. I'm pretty sure I'm pregnant, I've been to the doctors twice and each time I've done pregnancy test, one urine one blood, both negative. Also because the test came out negative the doctors wouldn't ac

You are not pregnant: Urine tests are accurate and blood tests are very accurate in detecting pregnancy. If you think you are pregnant bc you are late for your period, or your breasts hurt or other symptoms, there is probably another explanation. If you are having any new or concerning symptoms, a doctor should be willing to see you. You do not have to be pregnant to be seen by an Ob-Gyn. ...Read more

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How is a pregnancy test done on urine vs blood?

How is a pregnancy test done on urine vs blood?

Same type: Both tests measure hcg. The blood test measures a specific portion of the molecule called the beta subunit or beta-hcg. ...Read more

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I've been trying to get pregnant and I have all kinds of pregnancy symptoms but I took blood and urine pregnancy test its negative! Could be pregnan?

Unlikely: If the blood test was negative and they did an HCG quantitative test which was negative. Then probably not pregnant. You should see a fertility specialist if you are having trouble getting pregnant after 1 full year of trying. ...Read more

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Positive blood serum pregnancy test June 27. Urine tests still neg. Should I be concerned?

Positive blood serum pregnancy test June 27. Urine tests still neg. Should I be concerned?

June 27? today 6/22: I think you meant 6/17? Serum pregnancy test can detect pregnancy quite a bit earlier than the urine test can... if you tested positive on 6/17 with serum, the urine test should be coming soon.
any question/concern, consult doc.

Good luck. ...Read more

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Had a short spotty period three weeks ago pregnancy test both urine and blood both negative. Can I still be pregnant?

Had a short spotty period three weeks ago pregnancy test both urine and blood both negative. Can I still be pregnant?

Trust the test: Home pregnancy tests are very accurate. They are the same tests used in a doctor's office. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period. If you doubt the result you can repeat it in 1-2 days. If you were pregnant the hormone level would rise enough for detection. ...Read more

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Is I it possible to have negative urine pregnancy test but positive blood pregnancy test. Why do the urine test keep coming out negative?

Is I it possible to have negative urine pregnancy test but positive blood pregnancy test. Why do the urine test keep coming out negative?

Sure: That often happens if a woman is testing too soon after conception. After another week, the level of bHCG should be high enough that tests will be positive on any urine test, even a urine test after she had drank a lot of water. ...Read more

Dr. Dariush Saghafi
4 Doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more


Dr. Stephen Sudler
482 Doctors shared insights

Pregnancy Test (Definition)

A pregnancy test measures a hormone called human chorionic gonadotropin (HCG). HCG is a hormone produced during pregnancy. It appears in the blood and urine of pregnant women as early as ...Read more