From the Department of Obstetrics and Gynecology, Rothschild Hadassah University Hospital, Jerusalem, Israel.

Submitted for publication Feb. 17, 1961.

The authors are indebted to Dr. M. Freund and the staff of the Institute of Pathology of the Hebrew University-Hadassah Medical School and the Rothschild Hadassah University Hospital for performing the pathologic examinations.