how long to wait for a blood pregnancy test?
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Blood pregnancy tests used by doctors Your doctor can give you a blood pregnancy test as early as 11–14 days after ovulation.
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Blood tests They can pick up hCG earlier in a pregnancy than urine tests can. Blood tests can tell if you are pregnant about six to eight days after you ovulate. Doctors use two types of blood tests to check for pregnancy: Quantitative blood test (or the beta hCG test) measures the exact amount of hCG in your blood.
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Some very sensitive pregnancy test kits can detect pregnancy as early as 6 days before your missed period (5 days before you expect your period), however the levels of hCG this early are so low that you can expect any line to be faint.
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How long to wait to do a pregnancy test? While these home pregnancy tests can test positive for pregnancy as early as ten days after conception, obstetricians still suggest you wait until the first day of your missed period. This is the time when the hCG levels will be high enough to test on every home pregnancy test.
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A pregnancy test only reacts to the pregnancy hormone human chorionic gonadotrophin (HCG). However, if you're pregnant, this hormone will not be present in your urine or blood until 13 to 16 days after the release of an egg (ovulation), which is around the time you would normally get your period.
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Blood tests You get these at your doctor's office, but they're not used as often as urine tests. These tests can detect pregnancy earlier than a home pregnancy test, about 6 to 8 days after ovulation. It takes longer to get the results than with a home pregnancy test.
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The first few days after fertilization, hCG levels are often very low. A little over a week after conception, these levels should be high enough for detection by a blood pregnancy test. However, there is still a risk that the test will not produce an accurate result.
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The baseline and follow-up blood samples will be compared with the normal range for a pregnant woman (NHS 2016, SIGN 2013). Your midwife should call you with your test results within 48 hours.
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Blood pregnancy tests used by doctors To perform a blood pregnancy test, the doctor draws blood from a vein in your arm. This blood is sent to a laboratory for testing. The results of most blood pregnancy tests take at least a couple of days. The laboratory then advises the doctor of the result.
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If you use a home pregnancy test after an hCG injection, wait 20 days before interpreting the test as positive or negative. The best way to detect a pregnancy after an hCG injection or shot is the hCG beta blood test.
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By the 10th day from ovulation — usually the first day of your missed period — there is enough hCG in your urine for the store-bought pregnancy tests to detect it. Blood from your period will not impact whether or not there is hCG in your urine, so it won't impact your test results.
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When to Take a Pregnancy Test. A pregnancy test should be taken whenever a woman suspects she may be pregnant. 3﻿ Since it can take up to a week for hCG levels to rise, it is best to wait a good 7 days or so after a missed period to take a home pregnancy test.
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A blood pregnancy test can confirm a pregnancy as early as 10 days after a missed period (around 6-8 days after you have ovulated)—and sometimes, these tests can detect hCG even earlier.
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Depending on a woman's cycle, a blood test can detect pregnancy between 6 and 14 days after conception and is considered by doctors to be 99% accurate.
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If you think you may be pregnant, wait until the first day after your missed period to take a pregnancy test. If you had ovulation bleeding, this may be about 15 to 16 days after the bleeding occurred. Taking a test too early may result in a false-negative test.
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3 weeks later It's best to wait three two weeks after having unprotected sex before you take a pregnancy test, or from the first day of your missed period. If you take it before then, your body may not have had enough time to build up the hCG hormone, which is how pregnancy tests detect pregnancy.
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In most cases, an alpha-fetoprotein test is done this way: Blood is usually taken from a vein between the 15th and 20th weeks of pregnancy. The blood sample is then sent off to be checked at a lab. Results of the tests are usually ready in 1 to 2 weeks or less, depending on the lab.