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Because they are not 100% accurate

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16y ago
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Q: Why would a urine pregnancy test show you are not pregnant if you are?
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Related questions

Can sugar in your urine effect a pregnancy test?

I'm not a doctor, but my answer would be "probably." With Diabetes, sugar would show up in the urine, and sometimes women become diabetic when they get pregnant.


Can you find out sooner if your pregnant by having a doctor do a pregnancy test?

Maybe. A doctor can do a variety of tests, including urine tests, blood tests, and ultrasound. Sometimes a blood test will show a pregnancy that doesn't yet show up in a urine test.


Does hcg show up on urine at 4 and a half month pregnant?

Yes. It begins showing up at two weeks into the pregnancy.


Why wouldn't a pregnancy show in urine?

Urine doesn't come from the vagina.


If you used water instead of urine on a pregnancy test what would happen?

Nothing. The pregnancy test uses your hormones inside your urine to predict pregnancy. If this hcg hormone is not present, the test will not show you a positive result. The only thing you would see would be the "control line".


You have the coil would a test show if you were pregnant?

Yes, the coil does not affect a pregnancy test.


How many lines should show on a pregnancy test if you are pregnant?

Two lines should show up If you are pregnant on a pregnancy test /:


If you was pregnant but still having a period would a test show a true reading?

Yes, a pregnancy test would show a true reading.


Who can tell me if im pregnant?

You can yourself find out with the help of pregnancy test kit. It is a simple device in which you add a drop or two of your urine at the marked place and the lines show if you are pregnant or not- the directions can be seen in the pack.


Can you still be pregnant but get a neg urine test?

You are not pregnant. I don't know if this is a relief or a disappointment for you. the above answer is not true, it may take awhile for hcg levels to show up on both urine and blood streams. I would wait for about 2 weeks and take another test.


Why would a test show negative when 20wks pregnant?

Home pregnancy tests only measure hCG (the pregnancy hormone) up to a certain level. If you hCG levels are higher than what the tests reads then you can end up with a false negative.


Can my boyfriend show pregnancy symptoms if im pregnant?

If I'm pregnant can my boy friend show symptoms