Used properly, urine pregnancy tests are between 97% and 99% accurate. With such accuracy, a pregnancy blood test isnt always necessary. So why would your provider prescribe a pregnancy blood test or why would you want to get one on your own? It is important to take into account that using any blood or urine pregnancy test too early or, unknowingly misinterpreting the instructions, may result in an increased risk of false positive or false negative results.

A false positive is rare, but it can happen. This may be the case if you experience a chemical pregnancy or lose the pregnancy shortly after the fertilized egg attaches to your uterine wall. What type of pregnancy test confirms pregnancy first?

How do I use a home pregnancy test?

To most accurately detect pregnancy with a home pregnancy test it is best to wait at least a week after your missed period. However, some tests are sensitive enough to detect pregnancy after the first missed day of your period. Some factors might affect the accuracy of a pregnancy test, including:

You might get a blood test for pregnancy if you're having fertility treatments or if your doctor thinks there might be a problem. In very rare cases, you can have a false-positive result. This means you’re not pregnant but the test says you are. You could have a false-positive result if you have blood or protein in your pee. Certain drugs, such as tranquilizers, anticonvulsants, hypnotics, and fertility drugs, could cause false-positive results.Sometimes, there may be a positive test result but the woman is not pregnant. High HCG can also indicate that some health condition has increased levels of the hormone.