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Doctor insights on: False Positive Blood Pregnancy Test

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Dr. James Dukelow
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


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Is 5 days from ovulation too soon for a positive blood pregnancy test?

Is 5 days from ovulation too soon for a positive blood pregnancy test?

Defineitely: Absolutely, positively, certainly, no doubt about it yes! to be completely reliable, even a serum test should be about 11 days after ovulation. They are occasionally reliable before, but why do a test if you can't believe the results? ...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

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I had a positive blood pregnancy test with a 10&then the day after i had cramps but no blood then my next blood test came out negative can I pregnant?

I had a positive blood pregnancy test with a 10&then the day after i had cramps but no blood then my next blood test came out negative can I pregnant?

HCG tests: Was this a lab-run test or a home test? Usually, home quantitative HCG tests are not readily available. Assuming the two test you describe we're accurate, the negative 2nd result would indicate a loss of the pregnancy. However, one or both tests could have been inaccurate. Or, you may harbor anti anti IgA heterophile antibody which can give spurious results. Check with your gynecologist to be sure. ...Read more

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I had my iud removed last week and had a positive blood pregnancy test on Monday and a negative on Thursday. Is there a chance the negative could be wrong? I feel so pregnant but not due for period for another week. What are my odds. I want to be pregnant

I had my iud removed last week and had a positive blood pregnancy test on Monday and a negative on Thursday. Is there a chance the negative could be wrong? I feel so pregnant but not due for period for another week. What are my odds. I want to be pregnant

Testing too soon: Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about two weeks for the embryo to make enough HCG to produce a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully. ...Read more

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Good mornin doctor does weak positive blood pregnancy test indicate that one is really pregnant and are there chances that it could become negative ?

Good mornin doctor does weak positive blood pregnancy test indicate that one is really pregnant and are there chances that it could become negative ?

Re do the test: If the test result was not clear, and you have not had a period, you should repeat the test in 3-4 days. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. ...Read more

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I had a weak positive blood pregnancy test but started my period the following day what does it mean?

I had a weak positive blood pregnancy test but started my period the following day what does it mean?

Follow up testing: This sounds like you need to have further testing to determine if you are pregnant or not. A blood test may be helpful in measuring pregnancy hormones. An evaluation by a provider may be necessary to determine if your bleeding is related to your period or pregnancy bleeding/spotting. ...Read more

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I had a positive blood pregnancy test 6 days before my missed period i didn't think you could get a positive before implantation?

I had a positive blood pregnancy test 6 days before my missed period i didn't think you could get a positive before implantation?

Possible: It is possible but the hormone has to be a certain value to show up. It also depends on how long your cycle is. Usually it is too early to know. But that is after implantation. You can't get a positive value before implantation. It likely means ovulation occurred earlier than expected. ...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