Combined Liquid Chromatography–Tandem Mass Spectrometry Analysis of Progesterone Metabolites
Fig 4
Representative calibration curves in solvent.
A) (20S)-pregn-4-ene-3α,20-diol (r = 0.9999, y = 0.00015x). B) (20S)-5α-pregnane-3α,20-diol (r = 0.9998, y = 0.00014). Curves are constructed out of three measurements for each concentration.