Ca. 1400BCE

Ancient Egyptian papyrus in texts in the Papyrus Carlsberg Collection at University of Copenhagen documents earliest known pregnancy test: woman urinates into bags of barley and wheat. If seeds grow in either bag, woman is pregnant. If barley seeds grow more, infant will be male; if wheat, female. NIH study in 1963 showed that test was 70% accurate for determining pregnancy, though not gender (P. Ghalioungui, et al.)