A comparison between the first-born twin A and the second-born twin B was made in 103 pairs of twins delivered vaginally at the Department of Obstetrics and Gynecology, Wakayama Medical College, and at Kosaka Women’s Hospital. The twins were compared for birth weight, 1- and 5-min Apgar scores, and umbilical blood gas and pH. Although the mean values showed no significant difference in birth weight between twin A and twin B, the 1- and 5-min Apgar scores were higher for twin A, and the incidence of low 1-and 5-min Apgar scores was greater for twin B. The B twins with a birth weight < 2,500 g or delivered in the nonvertex presentation were especially at disadvantage. Blood gas analysis revealed a significant difference favoring twin A in umbilical PO2 and PCO2. The results of the present study suggest that there are differences at birth favoring the A twins despite similar perinatal mortality for both and that the B twins are at disadvantage.

Keywords:
Twins, Perinatal mortality, Birth weight, Apgar score, Blood gas
This content is only available via PDF.
© 1988 S. Karger AG, Basel
1988
Copyright / Drug Dosage / Disclaimer
Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.
You do not currently have access to this content.