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Doctor insights on: Pregnancy Test Blood

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Preg test positive but blood test negative missed period?

Preg test positive but blood test negative missed period?

Timing: It is possible that the urine pregnancy test detected HCG that was in the urine even as a pregnancy was failing (impending miscarriage) but by the time a blood test was done, the miscarriage had already occurred and the levels of the HCG pregnancy hormone were cleared. Alternatively, it could have just been a false (+) urine pregnancy test. ...Read more

Dr. Stephen Scholand
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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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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Can decidual bleeding make a blood pregnancy test negative.

Can decidual bleeding make a blood pregnancy test negative.

No: The term decidual bleeding is a very imprecise term to describe first-trimester bleeding due to shedding endometrial fragments. Like it's "cousin" implantation bleeding, these terms are very loosely defined and don't really mean much that is useful. If you are pregnant a test will be positive, regardless. ...Read more

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Is pregnancy test from blood accurate?

Is pregnancy test from blood accurate?

Pregnancy Testing: Yes, if performed after an appropriate length of time after possible conception. ...Read more

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Postive urine tests and negative blood test and pregnancy symtoms. Could i be pregnant?

Postive urine tests and negative blood test and pregnancy symtoms. Could i be pregnant?

Need to re do test: Blood test is generally more sensitive and reliable than a urine test for pregnancy. You may wish to repeat the urine test as you can do that home. Use first morning urine and follow the instructions for the test carefully. Only do the home test if you are 4-5 days past the expected onset of your period. ...Read more

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Positive blood serum pregnancy test June 27. Urine tests still neg. should I be concerned?

Positive blood serum pregnancy test June 27.  Urine tests still neg.  should I be concerned?

June 27? today 6/22: I think you meant 6/17? Serum pregnancy test can detect pregnancy quite a bit earlier than the urine test can... if you tested positive on 6/17 with serum, the urine test should be coming soon.. any question/concern, consult doc. Good luck. ...Read more

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Can blood ir pregnancy test detect one week pregnancy?

Nature: No. Remember your health class. A new fetus is not connected to a mother until it is big enough to have blood cells and chemicals that the mothers body can detect. This is about ten to fourteen days after conception. Only then can a pregnancy test work. ...Read more

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When can a blood test detect pregnancy?

When can a blood test detect pregnancy?

10 days.: Blood test HCG quantitative test can show pregnancy as early as 10 days of conception. ...Read more

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Positive pregnancy test and menstrual cramps normal?

Positive pregnancy test and menstrual cramps normal?

Threatened AB: It may be normal. Usually bleeding or cramping early in pregnancy can be concerning and may signal an abnormal pregnancy with an upcoming miscarriage. However, this isn't known yet so your OB will check hormone levels and decide if an ultrasound is helpful. Good luck to your early pregnancy. ...Read more

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Can home pregnancy test detect abdominal pregnancy?

Can home pregnancy test detect abdominal pregnancy?

Yes: Home pregnancy tests can detect whether you are pregnant or not. They do not tell you the location of the pregnancy. if you are pregnant, it will test positive. An ultrasound can help identify if you have an abnormal pregnancy. Best Wishes Dr M ...Read more

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When is a blood pregnancy test accurate?

When is a blood pregnancy test accurate?

About 8 days after: Blood HCG tests detect levels very soon after embryo implantation starts. The embryo usually start implanting at about 7 days after conception. So a day later blood HCG levels will start to go up. Urine tests usually turn positive at 10 days after conception. They are slightly less sensitive than blood tests. ...Read more

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Home pregnancy test was positive but blood hCG came back negative. Ob perform a blood test again. Hcg 750 progesterone 21. Why first hCG was negative?

Home pregnancy test was positive but blood hCG came back negative. Ob perform a blood test again. Hcg 750 progesterone 21. Why first hCG was negative?

Lab error: Presuming the first blood pregnancy test was close to the second, one of them had to be a lab error, probably the first one that was negative. If there is any question about the health of the pregnancy, your doctor can follow the bhcg level to see if it is rising appropriately and obtain an ultrasound when the level is high enough.For more info www.Askyourgynecologist.Org. ...Read more

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No period, negative pregnancy test with pregnancy symptoms?

No period, negative pregnancy test with pregnancy symptoms?

Pregnancy?: Purchase a home pregnancy test. They turn positive by the time you are about a week late. If it's negative, repeat in 1 week and call your doctor. ...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