File:Patent for home pregnancy test (US3579306), by Margaret Crane.png
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![File:Patent for home pregnancy test (US3579306), by Margaret Crane.png](https://upload.wikimedia.org/wikipedia/commons/thumb/9/97/Patent_for_home_pregnancy_test_%28US3579306%29%2C_by_Margaret_Crane.png/408px-Patent_for_home_pregnancy_test_%28US3579306%29%2C_by_Margaret_Crane.png?20180316200620)
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