OXYTOCIC ACTIVITY IN UNEXTRACTED BLOOD PLASMA DURING CALVING

in Reproduction
Authors:
C. G. van DONGEN
Search for other papers by C. G. van DONGEN in
Current site
Google Scholar
PubMed Close
and
R. L. HAYS
Search for other papers by R. L. HAYS in
Current site
Google Scholar
PubMed Close
DOI:
https://doi.org/10.1530/jrf.0.0110317
Volume/Issue:
Volume 11: Issue 3
Page Range:
317–323
Article Type:
Research Article
Online Publication Date:
Jun 1966
Free access

Sign up for journal news

Summary.

The oxytocic activity of unextracted blood plasma of calving cows increased from undetectable levels (<1 × 10 -10 i.u./ml) up to approximately 1 × 10 -4 i.u./ml within a few minutes before the time of expulsion of the calf, followed by a rapid decrease after parturition. The results indicate that the initiation of calving is not dependent on the oxytocic activity in the blood, but that blood oxytocic activity plays a role in the expulsion of the calf. These findings support the view that oxytocin has a physiological role in labour.

Reproduction is committed to supporting researchers in demonstrating the impact of their articles published in the journal.

The two types of article metrics we measure are (i) more traditional full-text views and pdf downloads, and (ii) Altmetric data, which shows the wider impact of articles in a range of non-traditional sources, such as social media.

More information is on the Reasons to publish page.

Sept 2018 onwards Past Year Past 30 Days
Full Text Views 132 35 5
PDF Downloads 131 21 1

 

  • Collapse
  • Expand
Print ISSN:
1470-1626
Online ISSN:
1741-7899