April 1994 volume 170, number 4

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STETRICS

AND GYNECOLOGY Copyright @ 1994 by Mosby-Year Book, Inc.

Editors in Chief FREDERICK P. ZUSPAN 0 E. J. QUILLIGAN

Associate Editors

STEVEN G. GABBE

THOMAS J. GARITE

MOON H. KIM ALBERTO MANETTA

Editor Emeritus JOHN 1. BREWER

Official Publication

AMERICAN GYNECOLOGICAL AND OBSTETRICAL SOCIETY

CENTRAL ASSOCIATION OF OBSTETRICIANS AND GYNECOLOGISTS

SOUTH ATLANTIC ASSOCIATION OF OBSTETRICIANS AND GYNECOLOGISTS

PACIFIC COAST OBSTETRICAL AND GYNECOLOGICAL SOCIETY

AMERICAN BOARD OF OBSTETRICS AND GYNECOLOGY

SOCIETY OF PERINATAL OBSTETRICIANS

SOCIETY OF GYNECOLOGIC SURGEONS

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Published by

MOSBY-YEAR BOOK, INC. St. Louis, X10 63146-3318 ISSN 0002-9378