As with urine/home pregnancy tests, it is possible to end up with false results (both negative and positive) from a blood pregnancy test. A false negative (test is negative, but you’re pregnant) can occur if the blood pregnancy test was performed too early.
What does a negative blood pregnancy test mean?
If an hCG test comes back negative, that generally means you’re not pregnant. However, if the test was performed too early in the pregnancy, before your body has had time to produce enough hCG, you can get a false negative.
How accurate is blood pregnancy test?
A pregnancy blood test is done in a health care provider’s office. It can find smaller amounts of HCG, and can confirm or rule out a pregnancy earlier than a urine test. A blood test can detect pregnancy even before you’ve missed a period. Pregnancy blood tests are about 99 percent accurate.
Can you be pregnant with no hCG?
A pregnancy where there is little or no detectable HCG (human chorionic gonadotropin) in the mother’s system and even the fetus may go undetected by doctors, until delivery. HCG is the hormone that makes a home pregnancy test turn positive. A baby that produces very little amount of HCG might fail the pregnancy test.
Can a blood pregnancy test be wrong at 2 weeks?
Qualitative hCG tests can detect elevated levels of the pregnancy hormone. But the hCG levels in blood and urine do not shoot up immediately when a woman becomes pregnant. Therefore, a test performed too early might produce an inaccurate result.
How long can pregnancy go undetected?
For some women, the physical tip-offs of pregnancy, like weight gain, morning sickness, heartburn, or fatigue, don’t happen. Or they’re so mild that a woman just doesn’t notice them. Depending on their body type, “it’s reasonable for a woman to make it to 30 weeks without looking pregnant,” Cackovic says.
Can hCG blood test tell how far along you are?
Quantitative blood test – measures the exact amount of hCG in the blood and can give you an estimate of how far along the pregnancy has progressed. Qualitative blood test – only checks for the presence of hCG. Since this test doesn’t measure the exact levels of hCG, it can’t offer an estimate of gestation.
How soon can blood test detect pregnancy?
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.
Do you need a blood test to confirm pregnancy?
For most women, a pregnancy blood test isn’t necessary. If you’ve taken a home pregnancy test and gotten a positive result, your ob-gyn will likely see you around eight weeks after your last menstrual period and confirm your pregnancy with a transvaginal ultrasound.
What causes an inconclusive blood pregnancy test?
This happens when you’ve tested too early and there isn’t enough pregnancy hormone to be detected. A false positive occurs when you have a positive result but you’re not actually pregnant. An inconclusive test shows nothing in the results window.
What can cause a false-negative pregnancy blood test?
But hCG is also responsible for the hook effect giving you a false-negative pregnancy test. The hook effect happens when you have too much hCG in your blood or urine. How is this possible? Well, the high levels of hCG overwhelm the pregnancy test and it doesn’t bond with them correctly or at all.