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      Influence of the Season on Plasma Prolactin Level in Cattle from Birth to Maturity

      ,

      Hormone Research in Paediatrics

      S. Karger AG

      Seasonal parameters, Radioimmunoassay, Prolactin, Cattle

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          Abstract

          Results are described giving prolactin plasma concentrations, as determined by radioimmunoassay, in 5 non-lactating female and 4 male calves from a few days after birth to an age of 20 or 24 months. The blood samples were always collected at the same time of day (8–9 a.m.). Prolactin concentrations were shown to be dependent on the season, higher values being found in the summer, lower values in the winter. A significant correlation (r = 0.9; p < 0.001) was found between prolactin levels and the number of daylight hours and temperature.

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          Author and article information

          Journal
          HRE
          Horm Res Paediatr
          10.1159/issn.1663-2818
          Hormone Research in Paediatrics
          S. Karger AG
          1663-2818
          1663-2826
          1974
          1974
          21 November 2008
          : 5
          : 4
          : 217-226
          Affiliations
          Institute of Physiology, Süddeutsche Versuchs- und Forschungsanstalt für Milchwirtschaft Weihenstephan der Technischen Universität München, Weihenstephan
          Article
          178634 Horm Res 1974;5:217–226
          10.1159/000178634
          4407506
          © 1974 S. Karger AG, Basel

          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.

          Page count
          Pages: 10
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