If it's an ectopic pregnancy, can a test paper also detect a positive urine result?

Patient's question:

Hello, does it mean that as long as you are pregnant, you can use a test paper to detect it, and the urine is positive? If it is an ectopic pregnancy, can the test paper also detect that the urine is positive?

Doctor's answer:

The ectopic pregnancy test paper is also positive. The test paper measures a certain hormone in the urine. When ectopic pregnancy occurs, this hormone will definitely be present in the blood. Urine is filtered from the blood by the kidneys, so as long as pregnancy occurs, whether it is ectopic or not, the test paper will show positive. However, ectopic pregnancy and normal pregnancy cannot be distinguished using a test paper. Other tests, such as ultrasound, need to be combined for diagnosis.

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