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Hormone testing, a linchpin of reproductive health care, relies on venipuncture to obtain blood samples. Fingerstick sampling is more convenient — but is it accurate? In an industry-sponsored study, researchers compared samples collected contemporaneously by venipuncture and fingerstick from 130 women (age range, 18–40) on menstrual cycle day 3. Fingerstick samples were reconstituted after drying on filter paper at collection. All samples were measured for anti-müllerian hormone, follicle-stimulating hormone, luteinizing hormone, prolactin, estradiol, testosterone, thyroid-stimulating hormone, and free thyroxine using standard commercially available immunoassays.
The correlation between venipuncture and fingerstick samples ranged from 0.99 t…