分析および生物分析技術ジャーナル

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Medroxyprogesterone Acetate and Progesterone Measurement in Human Serum: Assessments of Contraceptive Efficacy

Molly S Augustine, Andrea E Bonny and Lynette K Rogers

Medroxyprogesterone (MPA) is widely used as a contraceptive or for hormone replacement therapy after menopause. The use of MPA, specifically in adolescent girls, is linked to excess weight gain and decreases in bone mineral density. Metabolism and clearance of MPA is highly variable making this agent a candidate for individualized dosing strategies which could possibly decrease unwanted side effects. MPA has been measured in animal tissues and fluids for many years as a contaminant resulting from the use of growth hormones in food animals.

MPA has been measured by radioimmunoassay, gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS/MS). LC-MS/MS techniques have proven to be both more specific than radioimmunoassay and required much simpler sample preparation techniques than GC-MS. Here we describe an LC-MS/MS method specifically designed for monitoring MPA and progesterone levels in human serum. The technique in this report involves minimal sample preparation and yields results with precision and accuracy suitable for clinical use