Use-Effectiveness of Oral Contraceptives by Demographic Characteristics**This investigation was supported by grants from the Population Council and Public Health Service Grant HS00011 from the National Center for Health Services Research and Development. We gratefully acknowledge their assistance. ††For reprints write to: Planned Parenthood Center, 210 Franklin Street, Buffalo, New York 14202.

1971 ◽  
Vol 22 (10) ◽  
pp. 677-682 ◽  
Author(s):  
Swtantarta Ogra ◽  
Joseph G. Feldman ◽  
Jack Lippes
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