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Pregnancy tests work by analysing the amount of pregnancy hormone present in your body.

Generally, a urine pregnancy test is less accurate for two reasons:

a) the hormone is being detected through urine, which can alter moreso than blood, depending on how much water you drink and whether or not you use first morning urine (first morning urine is better for pregnancy tests).

b) the pregnancy test itself isn't as detailed and reliable as an analysed blood test.

The moment the sperm fertilises the egg, the hormone pregnancy starts circulating in your blood. A blood pregnancy test ought to give clear results within a couple of days. Your GP may want to take more bloods a week or so afterwards to verify the result.

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Q: How early will a blood test for pregnancy work?
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Related questions

How far along pregnant do you have to be for it to show up in blood work?

Pregnancy can generally be detected in blood work as early as 7-10 days after conception. A blood test measures the presence of hCG hormone, produced by the developing placenta, which indicates pregnancy. It is more sensitive than a urine test and can detect pregnancy at an earlier stage.


What is the abbreviation for a pregnancy test in blood work?

www.jdmd.com/glossary/medabbr.pdf


Does home pregnancy test work in the early second trimester?

Yes. Home pregnancy tests actually give accurate results in the first trimester, some as early as the first few weeks of pregnancy.


Is HCG pregnancy test a reliable pregnancy test for a 15-day delayed period?

If your period is more than 2 weeks late, yes an HCG blood test will certainly be able to detect the pregnancy hormone. Home pregnancy tests will work as well.


Can a negative for a pregnancy test change being positive?

Yes it can if you have tested too early. Here is a link for information on how pregnancy tests work: http://thefertilityshop.com/fertility/pregnancy-tests-work-a-17.html


When can a blood test pick up on pregnancy?

When you skip a period and your doctor sends you to get blood work it usually picks up HCG at that point....


Can you buy a pregnancy test for a dog?

No, pregnancy tests for dogs are typically performed by a veterinarian using specific diagnostic methods such as ultrasound or blood tests. It's best to consult a vet for accurate pregnancy testing for dogs.


How soon after intercourse can pregnancy be detected?

10 days for blood test and 14 days for Home pregnancy test. Well it could vary but this is the most likely when pregnancy can be detected. After you missed your period the home pregnancy SHOULD work if you were pregnant. Good luck.


What if your pregnancy test keeps coming out negative but you think your pregnant?

Then you should go in to see your doctor for them to do some blood work for you.


How do blood pregnancy tests work?

It tests the hCG (pregnancy hormone) levels that are in your blood.


Will a pregnancy test work if you take it during your period?

lf your on your periods, then your not pregnant.However, to be sure, wait till they finish, then wait another week to take a test, or get a blood test from the doctor.


Can you be pregnant with 12 negative pregnancy tests and still no period and having no symptoms other than feeling bloated?

Yes sometimes the home pregnancy tests aren't the best. you should have a blood test to test your hcg levels in your body Home pregnancy tests are very accurate but they do need a high enough level of hormone to work. Leave it for a week after your missed period. It is still possible, depending on when you took the HPT. If you still don't have your period in a couple of more days, try it again. If still neg, then you should wait at least 2 weeks and call your dr. Yes, you could be pregnant. Its possible you tested too early. But to be certain, see your doctor for a pregnancy blood test which is highly accurate.