tf'V ' < ,. K 











Fk;. 3. Effect of Enovid on endometrial histology. Biopsy on 15th day of treatment. 

 Decidua-like stroma of cervix, probably at internal os. (Magnif. x400.) Reproduced by 

 permission of Rock, J., C.-R. Garcia and G. Pincus, Synthetic Progestins in the Normal 

 Human Menstrual Cycle. Recent Progress in Hormone Research, Volume XIII (Edited by 

 G. Pincus), pp. 323-346, Academic Press, New York, 1957. 



