an acute decline in serum progesterone at 2000 h on d7-9 following lh-rh administration was not sustained until after 0600 h on d10 when serum 20 alpha-dihydroprogesterone ( 20 alpha-hydroxy-4-pregnen-3-one , 20 alpha-dhp ) in lh-rh treated animals rose significantly above control ( 2000 h , d10 ) and remained elevated throughout d11-12 .
C0033308
progesterone
C0012311
20