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Doctor insights on: At Home Blood Test For Pregnancy

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Is it possible to have a false negative blood test for pregnancy? I've had positive home pregnancy tests for 2 weeks but my blood test said negative

Is it possible to have a false negative blood test for pregnancy?  I've had positive home pregnancy tests for 2 weeks but my blood test said negative

Blood test better: Blood test for HCG is more sensitive and specific. There may be an issue with your technique for testing, especially how long after applying urine did you read the test? If you still have doubts, you may see your doctor for an ultrasound examination. ...Read more

Dr. Katharine Cox
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 be blood test -ve after having six +ve home pregnancy tests?

Can be blood test -ve after having six +ve home pregnancy tests?

Yes, but . . . : The pregnancy hormone, hcg, rises as the pregnancy grows, and falls if the pregnancy fails. So if you had a miscarriage, the pregnancy hormone level would drop. There is also such a thing as a "chemical pregnancy" which is a miscarriage that happens so early, that there is never any visible gestational sac by ultrasound. Lastly, you could have had a faulty batch of home pregnancy tests (unlikely). ...Read more

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To have a blood test at the docters would that give u an early result of pregnancy or would it be the same as takin a home test?

To have a blood test at the docters would that give u an early result of pregnancy or would it be the same as takin a home test?

See below:: Home pregnancy tests are usually accurate after you miss your period. A blood test is the most accurate way to detect pregnancy. Pregnancy hormone can be found in your blood a few days before your missed period. A blood pregnancy test is also useful in problem pregnancies such as ectopic pregnancies that don't make enough hormone to turn a home pregnancy test positive. Best Wishes! ...Read more

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I am showing signs that i am pregnant but all home pregnancy tests and blood test come back negative?

I am showing signs that i am pregnant but all home pregnancy tests and blood test come back negative?

Blood HCG test: If you had unprotected sex since your last period, missed your period by 5-7 days, did the test properly using first morning urine and it was negative, it is unlikely that you are pregnant. You may see your doctor for a blood HCG level that is more definitive. ...Read more

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I had 15 at home pregnancy tests come up positive. 15th one happened this morning. Went and got blood test today. Says neg? Confused! help?

I had 15 at home pregnancy tests come up positive. 15th one happened this morning. Went and got blood test today. Says neg? Confused! help?

Rely on the blood: Home pregnancy test are not necessarily right all the time. I am not sure if you have a bad batch. I would also make sure that the blood test was a quantitative test with a number. I would also recommend to repeat the blood test one more time. ...Read more

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Aside from my question before Ive taken multi home pregnancy tests n they've all come back indecisive/read error. So should I take a blood test?

Aside from my question before Ive taken multi home pregnancy tests n they've all come back indecisive/read error. So should I take a blood test?

Yes: If hpt is not decisive and you missed a period after unprotected sex, it would be prudent to take a blood test. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine. ...Read more

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Difference between home pregnancy test and pregnancy blood test?

Difference between home pregnancy test and pregnancy blood test?

Blood more sensitive: A blood test is more sensitive and can pick up a pregnancy earlier. A blood test can also quantify the amount of bhcg the hormone released when a woman is pregnant. Both tests are positive when bhcg is present. ...Read more

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If a at home pregnancy test says negative will the blood test say it too?

If a at home pregnancy test says negative will the blood test say it too?

Likely: Today's home preg tests can pick up very low levels of the preg hormone hcg. I consider those results reliable. If a result is questionable, repeating the test in a few days will be helpful. If there is some concern about the viability of a pregnancy then serial quantitative blood HCG levels would be helpful for diagnosis. ...Read more

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Will every women in pregnancy get a positive home pregnancy test? Not blood test. But hpt

Will every women in pregnancy get a positive home pregnancy test? Not blood test. But hpt

Eventually yes: If you are pregnant and take a home pregnancy test, it should eventually be pregnant. Maybe not right away but soon after being pregnant. If rare cases a woman does not get a positive urine test and must take a blood test but that is pretty uncommon. ...Read more

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If the home pregnancy test is positive and the blood test is negative is there still a chance of pregnancy?

If the home pregnancy test is positive and the blood test is negative is there still a chance of pregnancy?

Most probably not: Blood HCG test is more sensitive and usually detects pregnancy earlier than urine HCG test. Moreover blood test is done in labs with better controls that urine test done at home under stressful condition. ...Read more

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Why do some women never test positive on a home pregnancy test?? Not blood test. Followed directions. 10 weeks since sex

Why do some women never test positive on a home pregnancy test?? Not blood test. Followed directions. 10 weeks since sex

Persistent neg uhCG: The reason is unclear. Clearly some forms of the hCG molecule do not respond to the antibodies in the preg test and it gives a negative result, which is clearly a false negative. That being said doesn't mean that your pregnancy is at all abnormal with a + blood test. I wouldn't be concerned over this. ...Read more

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Is 8 days after unprotected sex enough time to detect pregnancy In a blood test ? I took a home test it came out negative but I feel so different

Is 8 days after unprotected sex enough time to detect pregnancy In a blood test ?  I took a home test it came out negative but I feel so different

It depends...: In some cases a blood test may be positive as soon as 8 days after an egg is fertilized (which may not be until a few days after sex, depending on when you ovulate), but it usually takes 10-11 days after fertilization. A home urine test will generally be positive a few days after the blood test. ...Read more

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I have been spotting for 1 day now going on 2(13days late w/ 2 positive at home pregnancy tests and a negative blood test. Could I still be pregnant?

I have been spotting for 1 day now going on 2(13days late w/ 2 positive at home pregnancy tests and a negative blood test. Could I still be pregnant?

Unclear if ever were: Urine pregnancy tests are very sensitive, but serum (blood) bHCG tests are even more sensitive, and are not prone to human error interpreting results like home urine pregnancy tests are. If your urine pregnancy tests were positive, but serum bHCGs test was negative on same day, then you were probably never pregnant. It really depends on timeline you did these tests. ...Read more

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One week late, neg. Home tests and blood test today was negative but I have been having the same symptoms as in my first pregnancy. Cld i be pregnant?

Unlikely: The blood tests are very accurate so it's unlikely (though possible - but you would need to be very very early). Pregnancy symptoms are non-specific, meaning they are the same symptoms experienced with many different conditions (cramping, fatigue, nausea, - ovarian cysts can cause, GI problems can cause these, etc.). So the symptoms are suggestive, but not reliable in determining pregnancy. ...Read more

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How reliable are at home pregnancy tests? Should one get a blood test by doctor instead?

Fairly reliable: Home pregnancy tests are marketed with the oversight and approval of the fda. The use a proven technology, and if used correctly are usually reliable. Any laboratory test, even a blood test in a doctor's office or hospital, has a small false positive and small false negative rate. By "small" i mean very small in the case of pregnancy tests. ...Read more

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8 days still no periods. Negative home pregnancy tests . Could it show positive on blood test?

8 days still no periods. Negative home pregnancy tests . Could it show positive on blood test?

Possibly. : It can also be due to not ovulating this cycle and therefore not getting a period on time. ...Read more