From the Department of Obstetrics and Gynecology, The University of Texas Southwestern Medical School and Parkland Memorial Hospital, Dallas, Texas.

This study was supported in part by grants from the National Heart Institute, National Institutes of Health, Public Health Service (H-2516 C3), and from the American Heart Association.

A summary of this case was presented and the last cesarean section was performed during the Clinical Meeting of the American Medical Association, Dallas, Texas, Dec. 3, 1959.

Submitted for publication Dec. 6, 1960.