TIL the first records of urine-based pregnancy tests are from 1350, in ancient Egypt. Women would urinate on barley and wheat for several days. If they grew, it meant pregnancy. Tests in 1963 found that 70% of the time, the urine of pregnant women did promote growth because of estrogen in the urine.

Read more: https://history.nih.gov/display/history/Pregnancy+Test+Timeline

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