International Journal of Gynecology & Obstetrics July 1997 [antikvár]

General Information International Journal of Gynecology & Obstetrics publishes articles on basic and clinical research in the fields of obstetrics and gynecology and related subjects, with emphasis on matters of worldwide interest. The journal is sponsored by the International Federation of Gynecology and Obstetrics (FIGO). For details on submission of manuscripts please refer to the detailed Instructions to Authors at the back of the journal. Manuscripts will be returned to authors without review if they do not adhere to the Instructions to Authors. The International Journal of Gynecology & Obstetrics is cited in the following: Biological Abstracts; Chemical Abstracts; Current Contents; Excerpta Medica; Index Medicus; Pascal et Francis (INISTCNRS). Publication Information International Journal of Gynecology & Obstetrics (ISSN 0029-7292). For 1997 volumes 56-59 are scheduled for publication. Subscription prices are available upon request from the Publisher. A special subscription rate is available to SOFIGO members. Please contact Chantal Pradier, FIGO Secretariat, 27 Sussex Place, Regents Park, London NW1 4RG, UK. Subscriptions are accepted on a prepáid basis only and are entered on a calendar year basis. Issues are sent by surface mail except to the following countries where Air delivery via SAL mail is ensured: Argentína, Australia, Brazil, Canada, Hong Kong, India, Israel, Japan, Malaysia, Mexico, New Zealand, Pakistan, PR China, Singapore, South Africa, South Korea, Taiwan, Thailand, USA. For all other countries airmail rates are available upon request. Claims for missing issues should be made within six months of our publication (maiiing) date. Orders, claims and product enquiries: please contact the Customer Support Department at the Régiónál Sales Office nearest you: New York Elsevier Science P.O. Box 945 New York, NY 10159-0945 USA Tel. (+1)212-633-3730 [Toll free number for North American customers: 1-888-4ES-INFO (437-4636)] Fax (+ 1)212-633-3680 e-mail: [email protected] Amsterdam Elsevier Science P.O. Box 211 1000 AE Amsterdam The Netherlands Tel. (+31)20-4853757 Fax (+31)20-4853432 e-mail: [email protected] Tokyo Elsevier Science 9-15 Higashi-Azabu l-chome Minato-ku, Tokyo 106 Japan Tel. (+81)3-5561-5033 Fax (+81)3-5561-5047 e-mail: [email protected] Singapore Elsevier Science No. 1 Temasek Avenue #17-01 Millenia Tower Singapore 039192 Tel. (+65)434-3727 Fax (+65)337-2230 e-mail: [email protected] © 1997, International Federation of Gynecology and Obstetrics. All rights reserved. 0020- 7292/97/$ 17.00. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise, without permission in writing from the copyright owner. PERIODICALS POSTAGE PAID AT RAHWAY, NEW JERSEY. International Journal of Gynecology & Obstetrics (ISSN 0020-7292) is published monthly January to December, by Elsevier Science Ireland Ltd., Bay 15K, Shannon Industrial Estate, Shannon, Co. Clare, Ireland. The annual subscription in the USA is $1034. International Journal of Gynecology & Obstetrics is distributed by Virgin Mailing and Distribution, 10 Camptown Road, Irvington, New Jersey 07111-1105. POSTMASTER: Please send address corrections to International Journal of Gynecology & Obstetrics, c/o Elsevier Science Régiónál Sales Office, Customer Support Department, 655 Avenue of the Americas, New York, NY 10010, USA. Advertising Information Advertising orders and enquiries may be sent to: International: Elsevier Science, Advertising Department, The Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, UK; Tel: (+44) (0) 1865 843565; Fax: (+44) (0) 1865 843952. USA & Canada: Weston Media Associates, Dan Lipner, P.O. Box 1110, Greens Farms, CT 06436-1110, USA; Tel: (203) 261 2500; Fax (203) 261 0101. Japan: Elsevier Science Japan, 9-15 Higashi-Azabu 1-chome, Minato-ku, Tokyo 106, Japan: Tel: +81 3 5561 5032; Fax: +81 3 5561 5045. All advertisements are subject to the approval of the Publisher and the Editors of the journal.