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Is it possible to have a negative urine pregnancy test and a positive beta?

By Andrea Rodrigo B.Sc., M.Sc. (embryologist).
Last Update: 03/07/2022

As we discussed in the article, the urine pregnancy test has a lower sensitivity. Its detection limit is higher, so a low hormone value is more likely to result in a false negative compared to the beta blood test result.

For example, if the sensitivity of the urine test is 30 mIU/ml, the blood test is 5 mIU/ml and the hormone value is about 20 mIU/ml, the urine test will give a negative result, while the blood test will give a positive result.

For this reason, it is essential to wait the time established by the specialist to do the pregnancy test. In this way, we allow time for the hormone to increase its level in the mother's body.

 Andrea Rodrigo
Andrea Rodrigo
B.Sc., M.Sc.
Embryologist
Bachelor's Degree in Biotechnology from the Polytechnic University of Valencia. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia along with the Valencian Infertility Institute (IVI). Postgraduate course in Medical Genetics.
Embryologist. Bachelor's Degree in Biotechnology from the Polytechnic University of Valencia. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia along with the Valencian Infertility Institute (IVI). Postgraduate course in Medical Genetics.