the sequential variation in receptor concentration ( early proliferative , 3800 -- 4300 sites/cell ; late proliferative , 9500 -- 11 200 sites/cell ; early secretory , 4900 -- 6200 sites/cell ; late secretory , 1800 -- 2300 sites/cell ) was in conformity for progesterone and the progestins , when concurrently measured .
C0033308
progesterone
C0033306
progestins