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

Radioactive microspheres (15 microns diameter) were used to measure capillary blood flow rates in the ovaries and ovarian follicles (Qf) in high fecund Romanov and low fecund Préalpes-du-Sud ewes at the preovulatory stage of the oestrous cycle. Additionally, assessments of the percentage of arterial blood passing through ovarian arterio-venous anastomoses were obtained. The mean +/- s.e.m. Qf per unit volume of theca [ml/min) x 10(4)/mm3) for non-atretic follicles in Romanov ewes was significantly greater (P less than 0.05) than that in Préalpes ewes (365.8 +/- 42.4, n = 19, compared with 241.3 +/- 30.1, n = 14). For each breed, the mean Qf value for non-atretic follicles was 8-10 times greater than that for atretic follicles. In Romanov ewes, total Qf [ml/min) x 10(4) and Qf per unit volume of theca was greatest in small-sized follicles (3.1-5.0 mm) while in Préalpes ewes, maximum flow was attained in larger-sized follicles (5.1-7.0 mm). The elevated Qf in small-sized follicles in Romanov ewes may be conducive to more follicles achieving maturation at a smaller diameter in this breed than occurs in the Préalpes ewes. The absence of flow through ovarian arterio-venous anastomoses in the Romanov, but not in the Préalpes, ewes suggests different mechanisms for controlling the distribution of the total ovarian blood supply in the 2 breeds.

Blood flow in the ovaries and ovarian follicles of Romanov and Prealpes-du-Sud ewes