can you get a false negative blood pregnancy test after ivf?
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A false positive can be the result of the fact that in many fertility treatments, hCG is given to “trigger” ovulation and may remain in the blood. A false negative might occur because a low level of hCG may be undetectable in a urine test despite a pregnancy starting.
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A negative pregnancy test does not absolutely rule out pregnancy or ectopic pregnancy; it may simply be too early to detect hCG in the mother's urine or blood.
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It's not common but sometimes this effect leads to urine and blood tests giving the wrong result. This error might happen even after you've had one positive pregnancy test and test again a couple days later. No, you're not going crazy — and you're not necessarily miscarrying when this happens, either.
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A third reason for a false negative result on a pregnancy test is diluted urine. If you drink a lot of water, it will dilute the hCG in your urine, and could cause you to get a false negative.
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If you are not pregnant, a false positive pregnancy test result is unlikely. The more likely explanation is that you had a chemical pregnancy (which produces enough hCG to turn a pregnancy test positive but miscarries shortly after) or a very early miscarriage.
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When can you take a pregnancy test during an IVF treatment cycle? Your doctor will likely schedule a blood test 10 to 14 days after the egg retrieval. The blood test will detect and measure the hormone hCG, the “pregnancy hormone.” You should not take an early at-home pregnancy test during IVF treatment.
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IVF Pregnancy Test Your doctor will likely schedule a blood test 10 to 14 days after the egg retrieval. The blood test will detect and measure the hormone hCG, the “pregnancy hormone.”
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Testing too early is unreliable as it can lead to a false result. If it's negative, it doesn't mean that you aren't pregnant—it could just be too early to tell. You can avoid that disappointment if you wait a little longer. If you are undergoing fertility treatments, testing too early can result in a false positive.
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Another common reason for getting a false negative is not having enough hCG in your urine. This may happen if you drank a lot of water, diluting your urine. This may also happen if you took the test later in the day. The hCG concentration is higher when you've held your urine for a while.
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Fresh embryo transfer: In fresh, or non-frozen, embryo transfer, there is a risk of getting a false positive pregnancy test if the test is taken too early. This is because hCG levels are often elevated from medications used to harvest eggs for IVF treatment.
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The 2-week wait after an embryo transfer is often filled with emotional, stressful, and exhausting ups and downs. Although some early signs such as light bleeding, spotting, and cramping could mean the procedure was a success, the only guaranteed way to determine if you're pregnant is a positive test.
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A false negative might occur as a low level of hCG may be undetectable in a urine test despite a pregnancy starting, as home pregnancy tests are less sensitive than the blood hormone tests we use. On average, about 2 weeks following your embryo transfer you will come back to our office for your pregnancy test.
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A negative hCG result means that it is unlikely that a woman is pregnant. However, tests performed too early in a pregnancy, before there is a significant hCG level, may give false-negative results. The test may be repeated in one week if there is a strong possibility of pregnancy.
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Accuracy. As with urine/home pregnancy tests, it is possible to end up with false results (both negative and positive) from a blood pregnancy test.
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As with urine/home pregnancy tests, it is possible to end up with false results (both negative and positive) from a blood pregnancy test.
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Your doctor may give you a urine or blood test to confirm the results and monitor your hCG levels. You may also get a transvaginal ultrasound to look for the gestational sac as confirmation that the pregnancy is proceeding normally. If you've received a false positive, your doctor's visit will determine that.
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A "Phantom hCG" causes a positive blood pregnancy test without being pregnant. Patients with a phantom hCG will have a persistently yet not significantly rising positive blood pregnancy test while the urine test is negative.