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It depends. I know this is likely not what someone who is hoping to be pregnant after a miscarriage wants to hear but there isn't a definitive answer since it depends when the miscarriage happened (how far along was the woman?) and also how long it takes for the hCG (the pregnancy hormone detected by pregnancy tests) to leave her system.

If a woman is wondering if a positive test is indicating the hormones left by a miscarriage or is a sign of a new pregnancy, she should go to her doctor or midwife for a quantitative (not qualitative) blood test or an ultrasound. A quantitative blood test will measure how much hCG is in her system while a qualitative blood test will do the same thing a urine test does -- say whether or not there is any hormone there. An ultrasound will examen the contents of the uterus to see if there is an embryonic sac or missed particles from the miscarriage.

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12y ago
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14y ago

until your hormone levels are back to normal. maybe a few months. if you want to try again, you should wait at least 3 months. your body wont be ready to carry another child until then and if you dont wait you chances of miscarrying again are very high

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13y ago

I think you mean positive. Negative means you are not pregnant and it will remain that way until you are pregnant again. It will show positive until the hormones settle which can take up to 2 months.

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13y ago

This can depend on a few factors. Sometimes your body miscarriages but everything that needs to exit the body doesn't exit all at once, so it could take several days and in some cases, a D and C has to be done to remove extra tissue, or what not, that being said, once everything is out of the body, the pregnancy test will show a negative result. You may need more than one test to get a negative and be sure to talk with your doctor to make sure he/she is comfortable with the way your results are showing up.

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16y ago

Less than about 25 hours.

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12y ago

the hell if i know

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Q: How long after a miscarriage will a blood pregnancy test show negative?
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Related questions

How long after a miscarriage should a pregnancy test show positive?

A pregnancy test can remain positive for 2 weeks after a miscarriage. Sometimes longer.


How long do you have pregnancy hormones after miscarriage?

In general for a couple of months.


How long after miscarriage does the cervix stay open?

It depends on how far along you were on your pregnancy


How is chemical pregnancy different from a miscarriage?

Let me answer your question...... Go on Wikipedia and type in: chemical pregnancy (difference) miscarriage. Sorry I couldn't type it down. IT'S TO LONG!!! Good Luck! Let me answer your question...... Go on Wikipedia and type in: chemical pregnancy (difference) miscarriage. Sorry I couldn't type it down. IT'S TO LONG!!! Good Luck! Let me answer your question...... Go on Wikipedia and type in: chemical pregnancy (difference) miscarriage. Sorry I couldn't type it down. IT'S TO LONG!!! Good Luck!


Will a pregnancy test show negative if you miscarried?

Pregnancy tests simply "look" for the presence of a hormone that is present when a pregnancy has occurred. After a miscarriage, a pregnancy test may remain positive for a while until all of that hormone has disappeared below the level the test needs to be positive. A blood (serum) pregnancy test (that you can obtain at a physician's office) can tell about how far along a pregnancy is, and this can be compared to how far along the person should be; the test results will drop in number over time if a miscarriage occurs until it reaches 0. How long it takes the hormone to leave the system is highly variable from several days to several weeks. Hope this helps! Dr. B.


You had bleeding for 1 day a negative pregnancy test but a fetal sac seen on a transvaginal scan have you lost your baby?

It could just be to early in your pregnancy to detect it on a test . I had 3 negative pregnancy tests even a blood test at the DR and I was indeed pregnant....about five weeks. And 8 months later delivered a healthy baby girl. However I did have a miscarriage about two months before I concieved her. I was bleeding for about to weeks straight and passing big blood clots. I went to the Dr and there was a gestational sac, but no embryo in it. they did a blood test and checked my HCG(pregnancy hormone) levels once a week and they got lower and lower, indicating the pregnancy was terminating. However dont panic just because you are bleeding it can be a normal sign of pregnancy as long as its not accompianed by cramping. I bled a little when I was pregnant with my second child and I carried him to term and he is happy and healthy!


How long must you wait before doing a pregnancy test?

if i had a miscarriage in late october would i still be getting positive pregnancy test results on December 12


If you miscarry how long will it take before a pregnancy test shows up negative?

I have seen a couple questions like this today and the most common answer is about 9 weeks. Talk to your doctor to make sure the miscarriage was complete and there was nothing left behind.


Can pregnancy three months after a miscarriage have a healthy baby?

Yes you can. 3 months means you healed a long time ago.


How soon after a miscarriage can pregnancy occur?

A pregnancy after a miscarriage is still possible. As long as the embro or fetus has been complete removed from the uterus. I am one of the many enjoying a pregnancy after feeling the hard grief of a miscarriage.


Can you have symptoms of miscarriage but the home pregnancy said positive?

Having a previous miscarriage wouldn't change the outcome of a pregnancy test. ~pawsalmighty It may actually read a positive result if you miscarried early enough before. The length depends on how long you were pregnant. This is because your hormone levels are dropping but still exist; therefor a + reading will show up.


For how long is normal to have cramps in early pregnancy?

Unfortunately there are several reasons contributing to cramping during pregnancy. They can be due to gas, constipation, implantation bleeding, ectopic pregnancy, miscarriage,vanishing twin syndrome, or pre-term labor.