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Doctor insights on: Accuracy Pregnancy Tests

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Dr. Ana Adelstein
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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Can an irregular menstrual cycle affect the accuracy of home pregnancy tests?

Can an irregular menstrual cycle affect the accuracy of home pregnancy tests?

No: With an irregular cycle it is more difficult to figure out the best time to do the test, but the test itself remains very accurate. ...Read more

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Are at home pregnancy tests ever wrong? What is the accuracy rate?

Are at home pregnancy tests ever wrong? What is the accuracy rate?

Quite accurate: If you take a test when you miss your period and it is negative, you may need to repeat in a week or less if the urine HCG level just wasn't high enough to trigger a +. ...Read more

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I am pcos. How many weeks till pregnancy tests show 100% accuracy? I have no symptoms but sore nipples but the pain is fading. 50 days late.

4 weeks: Most pregnancy tests will show positive around 4 weeks, which is the time of the missed period. They are quite accurate but it is unusual for any medical test to be 100% accurate. ...Read more

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Do pregnancy tests fail?

Do pregnancy tests fail?

Yes: You could have false positive test. Make sure you do a quantitative HCG to asses the amunt of hormones. ...Read more

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How do pregnancy tests work?

How do pregnancy tests work?

Measure hormones: Pregnancy tests measure the level of a hormone called human Chorionic Gonadotropin (hcg), which begins to be produced when the fertilized egg implants into the uterine wall. This hormone can be measured in urine or in the blood. The blood test is the more accurate of the two methods. ...Read more

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How to read pregnancy tests?

How to read pregnancy tests?

Yes: Each kit is a little different but there is usually a control line that is always there and a line next to it that is there if the pregnancy test is positive. ...Read more

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Do home pregnancy tests fail?

I suspect that most: Problems are due to user error rather than product failure. ...Read more

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Do early pregnancy tests work?

Do early pregnancy tests work?

Yes they do: Urine pregnancy tests are not quite as sensative as the blood test is but after a certain gestational age accurate as well. ...Read more

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Do homemade pregnancy tests work?

Do homemade pregnancy tests work?

No: One can buy a urine pregnancy test at the store. It will give a reliable result, if the test is done correctly, 1 week after missing a period, or 3 weeks after sex (when conception might have occurred). If a woman's normal regular period happens, then she is not pregnant at that time, and doesn't need to do a pregnancy test at that time. ...Read more

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How accurate are pregnancy tests?

How accurate are pregnancy tests?

See below: When performed correctly they are extremely accurate, reliable and valid. ...Read more

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Are OTC pregnancy tests accurate?

Are OTC pregnancy tests accurate?

Yes: Home pregnancy tests are accurate, reliable and valid. They become positive when you're about 1 week late. If they're negative at that time, repeat in 1 week. ...Read more

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How accurate are home pregnancy tests?

How accurate are home pregnancy tests?

Very: The pregnancy test is very accurate. It measures to 25 miu of b-hcg. In other words it turns positive about a week after conception. ...Read more

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Do all pregnancy tests get ghostlines?

Clarify please: I have tried looking up "ghostlines" ; "ghost lines" but am no closer to understanding what you are asking. Are you referring to evaporation lines? Please clarify this question and re-ask. ...Read more

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How accurate are home pregnancy tests?

How accurate are home pregnancy tests?

Very accurate: They are very accurate, but no test is perfect. If you are concerned the test is wrong, you can have your dr perform a blood test. ...Read more

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Are pregnancy tests effective at night?

If your HCG level is: High enough it will trigger a + test. Early on, use of a first morning void is often recommended due to increased concentration. ...Read more

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Can home pregnancy tests have glitches ?

Can home pregnancy tests have glitches ?

Pregnancy Tests: Define glitches. Home testing, if done appropriately and after a missed period are very accurate. ...Read more

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3 weeks late, 2 negative pregnancy tests?

3 weeks late, 2 negative pregnancy tests?

Not pregnant: Thank you for letting us know. You are not pregnant and thus that is not what is causing your missed period. ...Read more