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September 1977 in “Journal of Pharmaceutical Sciences” Minoxidil levels measured in human blood.
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December 2017 in “Scientific reports” The new test can measure very small amounts of testosterone in hair, and grinding the hair up first gives more accurate results.
14 citations
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January 1990 in “Fertility and Sterility” Some patients with high prolactin levels don't show symptoms because they have a form of the hormone that's less active.
October 2004 in “DOAJ (DOAJ: Directory of Open Access Journals)” Men with hair loss don't necessarily have higher levels of the hormone DHEA-S, but this hormone tends to decrease with age.
39 citations
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June 1982 in “The BMJ” Blood tests confirmed a baby in the womb had a CMV infection.