English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Seventy-two Yorkshire boars were used in five experiments to evaluate the temporal changes in relaxin concentrations in peripheral blood plasma during prepubertal development, copulation, after castration and after treatment with hCG. High concentrations of relaxin (484 +/- 27 pg ml-1) were detected at 11 weeks of age but there was no positive correlation with testicular development. Relaxin concentrations fluctuated in mature boars but the results do not suggest a diurnal rhythm, although there is the possibility of pulsatile secretion. A decrease (P &lt; 0.05) in circulating relaxin was observed before and immediately after copulation. Castration of boars at 90, 115, 160 and 200 days of age did not significantly decrease relaxin concentrations within 48 h. Administration of hCG significantly depressed relaxin secretion at 90 days of age but not at 160 days of age. These studies suggest a non-gonadal source of boar relaxin that is not correlated with testicular growth or testosterone concentrations, is modulated by copulation and by hCG but only at specific stages of development.

Relaxin in peripheral plasma of boars during development, copulation, after administration of hCG and after castration