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How accurate are blood tests when your only a week pregnant?

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βˆ™ 2006-08-15 14:30:10

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2006-08-15 14:30:10
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Q: How accurate are blood tests when your only a week pregnant?
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Can i blood pregnancy text be negative if you took it before you expect you period?

Pregnancy tests are almost always accurate with home tests it is more common to get a false negative then a positive if it says you are pregnant then you are.... With a blood test you will most likely always get the correct reading because your blood changes it increases and it develops a hormone that is only there when pregnant.

Can you get a negative home pregnancy test and a positive blood test?

Yes. The home tests aren't accurate and only the blood test is the accurate one.

How to know if a girl isn't pregnant?

negative blood test is the only quick answer...home tests arent usually very accurate until missed period or a sometimes a week later. It's happened to me when I was pregnant.

Are home pregnancy tests as accurate as blood tests?

Home pregnancy tests are not as effective as blood tests. I am on my fifth pregnancy and have had many occasions where a home test has simply not shown up. Although I have been told this is rare, a blood test is the only way to be certain.

If your period was three days late and the fourth day you had only a brown discharge and two HPT tests were negative could you be pregnant?

Yes you could be pregnant. Wait a few more days and do another HPT or see your doctor for a blood test. More accurate.

How soon will a blood test show if you are pregnant?

I called and asked my obgyn, and she said a blood test would only be accurate two weeks after your missed period and to only do it as a validation of a home pregnancy test. A blood test shows before you've missed a period, but at this early stage you would have to have 2 blood tests to show that the hormones are rising as there is quite a variation in normal, and a single test would not show you are pregnant.

How can test a pregnancy?

If you mean how to see if you are pregnant, then you could do a home pregnancy test which you have to pee on and it measures your hCG which is a hormone only found in pregnant women. You can also go your local doctor and ask for a blood test. There are two tests from the doctors; Quantitative Blood Test - which measures you exact amount of hCG or the Qualitative Blood Test - which gives you a basic yes or no answer to whether you are pregnant or not. Pregnancy tests are around 97-99% accurate, but with a home pregnancy test, be sure to do 2-3 just to make sure.

Is blood testing the most accurate for alcohol?

Yes. All other "tests" are really only estimates and are inaccurate to varying degrees.

What if you are pregnant and had your period and you take 5 pregnancy tests where all negative?

You need to see a doctor. It is possible that you have miscarried, but only scans and blood tests will tell for sure.

Is a home pregnancy test more accurate than a blood test from a doctor?

Home pregnancy test are notoriously inaccurate. Go to your doctor for a serum hcg test. Over the counter urine pregnancy tests are actually quite accurate. They are not as accurate as the blood test that physicians can order, but newer urine tests can detect HCG in the urine as early as 8-10 days after conception - usually before the 1st missed period. See the link below for more information. _____________________________________________________________________ home pregnancy tests claim to be around 99% accurate after a missed period. however, blood tests done at your doctor's office are able to detect levels of HCG much earlier. blood tests are considered around 100% accurate, where as home pregnancy tests are less due to possible errors in timing or errors in performing the test. The answer preceding this one is accurate in that the blood test may be able to tell you if you are pregnant earlier - we can tell you within 3-5 days if you are pregnant. However, the actual utility of the increase in accuracy is questionable. Most people will not even suspect they are pregnant until they miss a period, by which time an over the counter urine test (which cost about 10 dollars) is just as accurate as a urine or blood test done in a doctor's office (and will cost you over 100 dollars, and possibly up to 500 dollars or more if you go to the Emergency department). Bottom line: use a urine pregnancy test at home if you have missed your period and think you may be pregnant. If you are pregnant, see your OB/Gyn or Primary care physician for follow up. A blood test is only useful if you are having problems with your pregnancy to help us work out what may be going on.

Can blood pregnancy tests be wrong?

No. Yes, if the test is taken before the first day of your period. Blood tests are only accurate 7-12 days after ovulation. For some woman that may mean that the test may not be accurate till the day of their expected period. Once that day has come then blood tests are almost never wrong. You say no but then you say almost never so what is it can it happen or not??

If your only 1 week pregnant and had a blood test showing less than 1 for hcg levels is there ANY chance you could be pregnant?

you have hcg hormone even when you are not pregnant. the most sensitive tests only say you are pregnant if you are over 25ml of hcg

Can you be pregnant and the home pregnancy test says your not?

Oh yes! Tests are only about 85% accurate. And some conditions might cause the test to fail more often.

Can a home pregnancy test tell you if you are 2 weeks pregnant?

NO, these tests only can tell if you are pregnant or are not pregnant.

How do you know if you need to take a blood test to see if you are pregnant?

If you think you might be pregnant then you should go and get a prgnancy test from the pharmacy (they only cost a couple of dollars). They are just as accurate as the test a doctor does and you only have to pee on them as opposed to needing to have blood drawn. (I'm a doctor)

How accurate is a nine panle drug test?

A nine panel drug test may or may not be very accurate. The accuracy is directly related to the quality of the lab and/or sample for testing. "Nine Panel" refers to how many drugs(panels) the test is checking for. It seems to me that urine tests are less accurate than hair tests and hair tests less than blood tests. All three can show false positives, but only two can be tricked.

How can you really know if your pregnant or not?

The only way to know for absolutely certain is to have an Ultrasound and examination by an ObGyn. However, standard Pregnancy tests available in most pharmacies and grocery stores are generally very accurate, along with the tests given by a doctor.

Does cipro interfere with blood tests for std?

it is inafective in the blood tests it only treats the clap.yhe blood would still show signs of infection.

How soon can a blood test show you are pregnant?

Blood tests may show that you are pregnant as little as seven days after conception. Most doctors will only do one if you have missed a period which is 14 days after conception. Hi, A Quantitative blood test can show if you're pregnant 5-7 days after you think conception may of taken place.

How many pregnancy tests should you take?

Home pregnancy tests are only 50% reliable if you are not pregnant, but almost 100% reliable if you are pregnant. In other words, they are not very reliable. (They are much more likely to tell you that you are pregnant if you are not than to tell you are not pregnant if you are.)It is better to see a doctor to have a blood test and ease your stress.actually, home pregnancy tests can be quite accurate if taken after your missed period. the above information is slightly off in terms of false results. actually, tests are more likely to tell you you're NOT pregnant when you ARE (false-negatives), rather than you ARE pregnant when you're not (false-positives). false-positive results are very rare, while false-negatives are more common (and usually caused by testing too early or with diluted urine). if you follow the instructions provided with the test kits, they ARE pretty reliable. though, i agree with the above answerer that doctor's results are always the MOST accurate.

Can you tell if you're pregnant after only two weeks?

You can tell if you are pregnant two weeks after conception, which is generally around the time of your expected period. Home tests are quite reliable by this time, and blood tests can tell about a week before this. You cannot tell you are pregnant two weeks after your last period as this is around the time you normally conceive.

Could you be pregnant if your period was a week late and then was very very light and only lasted for 5 days?

Hello. Yes you could be. See your doctor for a blood test. The blood test is highly accurate.

If you have just finished your 5th period and then had 4 pregnancy tests and all are positive but your only 13 but have had sex are you pregnant?

Time to speak to you most calm parent, and go see a doctor right away. It is possible to be pregnant, but only blood work will be for sure.

Can you be pregnant if your 10 days late for your period neg HPT then get a period that only lasts for 1 in a half to 2 days spotting then med then spotting then little to nothing only when you whip?

10 day tests are usually not as accurate as the tests that are taken later. Why don´t you take another test?

Could you still be pregnant if you only spotted during your period but a pregnancy test was negative?

It is unlikely, but there is always a chance that you could be pregnant. See a doctor or clinic for a blood test. These are more reliable than home pregnancy tests.