in order to confirm that ru 486 decreased progesterone-occupied nuclear progestin receptor levels when injected 4 h after progesterone , animals treated as in the behavioral experiment were killed 6 or 10 h after progesterone injection ( 2 or 6 h after ru 486 ) , and nuclear progestin receptor levels were measured .
C0033308
progesterone
C0033306
progestin