PT  - JOURNAL ARTICLE
ED  - ,
TI  - The preparations
AID  - 10.1136/dtb.4.19.76
DP  - 1966 Sep 16
TA  - Drug and Therapeutics Bulletin
PG  - 76--76
VI  - 4
IP  - 19
4099  - http://dtb.bmj.com/content/4/19/76.1.short
4100  - http://dtb.bmj.com/content/4/19/76.1.full
SO  - Drug Ther Bull1966 Sep 16; 4
AB  - The various progestagens used differ in potency, but their potency ratios in humans are not precisely known because different assay methods give different results. Nevertheless for clinical purposes the rank order of milligram potency seems to be approximately as follows: norethisterone and ethynodiol (most potent), norethynodrel, lynoestrenol, megestrol acetate (least potent).