using the chronically catheterized fetal sheep preparation , we measured unconjugated and sulfoconjugated pregnenolone , 17 alpha-hydroxypregnenolone , dehydroepiandrosterone , and estrone in fetal and maternal plasma over the final 20 days before spontaneous vaginal delivery at term .
C0373704
pregnenolone
C0376260
17 alpha-hydroxypregnenolone