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Doctor insights on: How Common Is A Negative Pregnancy Test To Be False

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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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What can cause a false positive pregnancy test? Is it possible to not be far enough along for a blood test to detect pregnancy?

What can cause a false positive pregnancy test? Is it possible to not be far enough along for a blood test to detect pregnancy?

Tumor and yes: Early menopause may raise serum betahcg levels enough to give a false positive, some tumors and molar pregnancy produce beta HCG and will give a positive test. Yes, you may be too early in pregnancy to have a positive blood test. If you think you are pregnant, you may wish to repeat the tests in a week. ...Read more

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How common is it to get a false negative on a pregnancy test?

How common is it to get a false negative on a pregnancy test?

Depends: Almost all comercial preg tests report efficacy close to 99%. Trick is however, that depends on when they are done. There is a higher false negative rate if performed before the time os the missed cycle. Most-if not all- pregnancy tests should be positive by one week after a missed cycle. Always check the boxes. They state their "sensivitiy" level. ...Read more

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How often could a false negative pregnancy test occur?

How often could a false negative pregnancy test occur?

Not often: Pregnancy tests are quite accurate. A pregnancy test should be accurate by about 12 days after your ovulation, so by the time your period is late the test should be accurate. ...Read more

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What causes a chlamydia test to be a false negative?

What causes a chlamydia test to be a false negative?

It's just random: Tests miss 5-10% of infections, more by urine, less by urethral or vaginal swab. Maybe other possibilities as well. Chlamydia clears on its own in a few weeks to months, so current testing is negative. Or s/he received an antibiotic for chlamydia (and didn't admit it) or for another infection, curing chlamydia or interfering with the test. Partner(s) of infected person need Rx, even w/ neg tests. ...Read more

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Is it possible to get a false negative after a confirmed positive pregnancy test?

Is it possible to get a false negative after a confirmed positive pregnancy test?

Technique: If you do not do the test correctly, it may turn out negative and by definition would be false negative. ...Read more

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Is it possible to have a negative pregnancy test throughout pregnancy?

Is it possible to have a negative pregnancy test throughout pregnancy?

No: Pregnancy tests detect beta HCG and one cannot be pregnant and not have HCG in the blood and urine. The only way to have negative test would be with bad test method. ...Read more

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Is it possible to get false negatives on a pregnancy test?

DEFINITELY: False negatives are possible. If it is too early for implantation of maybe even if it is an ectopic pregnancy. The false positives are the ones that are rare! ...Read more

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What is a reason for you to have 3 positive home pregnancy tests but a. Negative blood pregnancy test?

What is a reason for you to have 3 positive home pregnancy tests but a. Negative blood pregnancy test?

Possibilities: Here are a few possibilities: 1. You are doing the home test wrong --- letting it sit too long or have expired tests 2. You miscarried between doing a home test and taking the blood test 3. There is a lab error on your blood test. Try repeating the urine now since you have had a neg blood test. If positive then repeat the blood. Blood is the more accurate test. ...Read more

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How likely is it to get a false negative pregnacy test?

How likely is it to get a false negative pregnacy test?

Not very likely.: Currently available urine pregnancy tests are accurate over 98% of the time when the HCG is over 25 (but 10 to 14 days after conception). If the test is negative you are not pregnant or you are less than 10 days along. ...Read more

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Is it possible to get a positive pregnancy test followed by a negative one?

Is it possible to get a positive pregnancy test followed by a negative one?

Yes.: If the test is done improperly you can get any result. If you were pregnant and had a spontaneous miscarriage it may change. ...Read more

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How is it possible to have a negative pregnant test but early pregnancy symptoms?

How is it possible to have a negative pregnant  test but early pregnancy symptoms?

Pseudopregnancy: If you are sexual active and miss your period then you have symptoms of pregnancy with negative test it cab be too early or you are stressful to worry or anticipate to be pregnant, See your gyn if persisted. good luck ...Read more

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How common is a false negative quant blood pregnant test 3 weeks after a missed period? And what would cause the false negative?

How common is a false negative quant blood pregnant test 3 weeks after a missed period?  And what would cause the false negative?

Not often: The quant HCG is very accurate. Knowing when you ovulated is more difficult. Repeat the quant test a few days later just to be sure you didn't ovulate later than expected. You could always just repeat a urine pregnancy test. This is very accurate as well especially when using the urine from your first void of the morning as this is often more concentrated. ...Read more

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Is it possible to get a false positive on a pregnancy test?

Is it possible to get a false positive on a pregnancy test?

Yes: Remember that it's uncommon but that it can happen. In fact, men with testicular tumors often have a positive pregnancy test. As always, it's the big picture. ...Read more

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Is it possible to be pregnant with a negative pregnancy test?

Is it possible to be pregnant with a negative pregnancy test?

See below: The only way would be to have a false positive test. One in which the patient is pregnant bu the test is negative. This happens when the directions are not followed correctly. ...Read more

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What could cause a pregnancy test to give a false positive?

What could cause a pregnancy test to give a false positive?

Big cause: is letting it sit out and reading it much later than it should have been read. ...Read more

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Is it possible to be pregnant and the home pregnancy test to be negative.

Is it possible to be pregnant and the home pregnancy test to be negative.

Possible/not likely: The home pregnancy tests are pretty good. If you feel sure that you are pregnant and the home test is negative you could ask your doctor to check a serum pregnancy test. Also you could just wait a few days and recheck the home pregnancy test. ...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