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

The objective of this study was to evaluate the effect of treatment with 10 or 20 μg of GnRH and type of FTAI protocols (Ovsynch and Heatsynch) on pregnancy rate of lactating dairy cows submitted to the synchronization at FTAI (n = 581). The animals were distributed among four treatments, allocated factorial design 2x2: Treat 1- Ovsynch (20 μg GnRH on D0; PGF on D7; 10 μg GnRH on D9 and FTAI on D10; n = 141), Treat 2- ½ Ovsynch (10 μg GnRH on D0; PGF on D7; 10 μg GnRH on D9 and FTAI on D10; n = 159), Treat 3- Heatsynch (20 μg GnRH on D0; PGF on D7; 1 mg EB on D8 and FTAI on D10; n = 147) and Treat 4- ½ Heatsynch (10 μg GnRH on D0; PGF on D7; 1 mg EB on D8 and FTAI on D10; n = 134). The Group Ovsynch (Treat 1 and 2) presented greater pregnancy rate than Group Heatsynch (Treat 3 and 4) at 28 days (45.7% (137/300) and 39.9% (112/281), respectively; P = 0.07) and at 56 days of gestation (41.0% (123/300) and 34.2% (96/281), respectively; P = 0.06). There were no statistical difference (P > 0.10) on pregnancy rate at 28 (44.4% (128/288) vs 41.3% (121/293); P = 0.50) and 56 days (38.2% (110/288) vs 37.2% (109/293); P = 0.68) between the dosages of the GnRH. The pregnancies losses (between 28 and 56 days) were not different between the FTAI protocols and GnRH dosage (P > 0.10). We concluded that the Ovsynch protocol presented greater pregnancy rate at FTAI than Heatsynch protocol and the administration of 10 μg of buserelin Acetate, at the beginning of these protocols did not decrease the efficiency of FTAI protocols in high-yielding Holstein cows.

Redução da primeira dose de GnRH em vacas holandesas de alta produção sincronizadas com Ovsynch ou Heatsynch