From the Research Laboratory, Department of Pathology, Free Hospital for Women, Brookline, Mass., and the Departments of Pathology, Obstetrics and Gynecology, Harvard Medical School, Boston, Mass.
*Rockefeller Research Fellow; present address: Queen Charlotte Hospital, London, England.
†Present Address: Columbia University, College of Physicians and Surgeons, New York 32, N. Y.
This investigation was supported by Research Grants C-2378, C-1471, and C-2451 (c) from the National Cancer Institute of the National Institutes of Health. U. S. Public Health Service.
We are indebted to Dr. John Craig, Pathologist of the Children's Hospital, Boston, Mass., for the infant ovaries used in the study.
Submitted for publication Nov. 7, 1960.