1. Comparison of the pharmacokinetics of Crinone 8% administered vaginally versus Prometrium administered orally in postmenopausal women3 
Howard Levine, N Watson, B.Sc. 
Fertility and Sterility 
Volume 73, Issue 3, Pages (March 2000)
DOI: /S (99)

2. FIGURE 1
Mean progesterone concentration (ng/mL) obtained by RIA and liquid chromatography-mass spectrometry. ◊—– Progesterone gel (RIA), □—– progesterone gel (LC-MS), ▵--- progesterone capsule (RIA), ○--- progesterone capsule (LC-MS).
Levine. Crinone 8% vs. Prometrium. Fertil Steril 2000.
Fertility and Sterility  , DOI: ( /S (99) )