Effect of Utilization of Single or Double Prostaglandin Administration Within an Ovsynch Fixed-Time Artificial Insemination Protocol During Summer Season in Dairy Cows
| Autor: | Fabio De Rensis, G. Morini, Fernando López-Gatius, Irina Garcia-Ispierto |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0303 health sciences
Artificial insemination medicine.medical_treatment 0402 animal and dairy science Prostaglandin 04 agricultural and veterinary sciences Biology 040201 dairy & animal science Summer season 03 medical and health sciences chemistry.chemical_compound Fertility Animal science chemistry Fixed time Dairy cow medicine Season Administration (government) 030304 developmental biology |
| Zdroj: | Repositorio Abierto de la UdL Universitad de Lleida Recercat. Dipósit de la Recerca de Catalunya instname |
| ISSN: | 2300-8733 |
| DOI: | 10.2478/aoas-2019-0022 |
| Popis: | This study investigated the fertility of dairy cows during summer season after treatment with a single or double PGF2α in a progesterone (P4)-based Ovsynch protocol for fixed-time artificial insemination (FTAI). The data were compared to a treatment effectuated during winter season. Two groups of 60 dairy cows each were randomly assigned on day 60 post-partum to single PGF2α or double PGF2α group. At removal of the P4 treatment the single PGF2α group received a single dose and the double PGF2α group received two doses of PGF2α at 24 hours apart. In each group, 30 cows were treated during the summer (June, July and August) and 30 cows during the winter (December, January and February) season. During summer season a double PGF2α dose did not influence pregnancy rate at FTAI but improved cumulative pregnancy rate 60 days after FTAI (43% vs 69% for single PGF2α and double PGF2α administration, respectively; P2α administration did not modify PR or cumulative PR. In conclusion, during summer the utilization of a double instead of single PGF2α treatment into a P4-based Ovsynch-FTAI protocol did not increase pregnancy rate at FTAI but improved cumulative pregnancy rate. |
| Databáze: | OpenAIRE |
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