From the Department of Obstetrics and Gynecology, University of Iowa Medical School, Iowa City, Iowa.
This study was supported in part by a grant-in-aid from Hoffmann-La Roche, Inc., Nutley, N. J.
The alphaprodine used in the study was kindly supplied by G. K. Hawkins, M.D., of Hoffmann-La Roche, Inc.
Submitted for publication Aug. 12, 1965.
*Hoffmann-La Roche Inc.