false-positive test

A chemical pregnancy takes place before a fetus can be detected by ultrasound, and not too early for most pregnancy tests to detect levels of human chorionic gonadotropin (hCG). HCG is a pregnancy hormone the embryo produces after implantation. Your medical practitioner can confirm a chemical pregnancy by running a blood test for it.

Most of the time, this hormone is only inside a woman’s body during pregnancy, so a pregnancy test is usually fairly conclusive. Because most pregnancy tests can detect even very low levels of hCG in the urine, a pregnancy test taken in the days or immediate weeks after the miscarriage can show a false-positive test result, but this happens rarely.

To simplify, this means that the test can show that you are pregnant even if you’re not. A woman can have a false-positive test result if protein or blood is present in the urine. Certain drugs, such as anticonvulsants, tranquilizers, and hypnotics may also cause the test to read the false-positive result.

  1. October 22, 2018

    A woman might get her period a few days after a positive pregnancy test and assume she had a false-positive result. However, it could be that she was pregnant but miscarried very early on. “It’s not that the test is wrong—it was completely accurate at picking up the hormone hCG. It’s important to note that bleeding after a positive pregnancy test doesn’t always mean a chemical pregnancy. Bleeding is also common during implantation, which is when the embryo attaches to the uterus.

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