The RBA (relative binding affinity) of norethisterone cenan-thate to progesterone receptor was evaluated by competitive combination analy-sis using ~3H-progesterone.

• 实验结果表明:如以孕酮与其受体结合的相对结合亲合性(RBA)值为100时；炔诺酮庚酸酯的为48.；6。