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one of the earliest pregnancy tests was a fish, called a European Bitterling. If injected with a pregnant person s urine, its ovipositor (egg-laying organ) will protrude, indicating a positive result

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Fun Fact: one of the earliest pregnancy tests was a fish, called a European Bitterling. If injected with a pregnant person’s urine, its ovipositor (egg-laying organ) will protrude, indicating a positive result

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early 20th century pregnancy tests involved a lengthy and costly process where the urine sample would be injected into five mice per woman. The mice would then be dissected to find out if they were ovulating. These results would be obtained in a week.

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