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The hormone used to determine pregnancy is present in our blood and urine. Using urine for the test is "non invasive", meaning no one is poked with a needle or scanned by a machine. We all pass urine everyday without pain or help. So basically it is the easiest, most cost efficient way to do the test.

A blood test is more accurate. It can even tell a doctor if if the pregnancy is (probably) more than one baby by the the amount of hormone present, compared to the date of conception.

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15y ago

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