15 Interesting Facts About Pregnancy Tests - Page 11

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And the first test was on to something…

Nih.gov explains that much later in history — 1963 to be exact — researchers found that the urine of pregnant women did in fact promote seed growth–70 percent more than the urine of men and of women who weren’t pregnant. This may have been the first test that found elevated levels of estrogen in a pregnant woman’s pee.

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