From the Department of Obstetrics and Gynecology, Los Angeles County General Hospital and the University of Southern California School of Medicine, Los Angeles, Calif.

Supported in part by grants from the Population Council, New York, N. Y., and the California State Department of Public Health.

Presented at the 15th Annual Clinical Meeting of The American College of Obstetrics and Gynecologists, Washington, D. C., Apr. 15-20, 1967.

Submitted for publication June 14, 1967.

^*Present address: Family Planning Branch, Office of Economic Opportunity, Washington, D. C.