Usage History of 'progesterone'

The following chart shows how frequently 'progesterone' appeared in printed materials over time. For example, the word 'progesterone' occurred 1 time in books in 1848 and 57,394 times in 2008. From 1848 to 2008, the word 'progesterone' was used a total of 2,283,217 times in books scanned by Google. See Reference: Google Ngram project.

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